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인기 있는 삼각법 >

(sec(x)+tan(x))/(cot(x)+cos(x))=sec^2(x)

해법

\frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} = sec^{2} (x)

해법

솔루션 없음 x \in R

솔루션 단계

\frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} = sec^{2} (x)

빼다

sec^{2} (x)

양쪽에서

\frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} - sec^{2} (x) = 0

\frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} - sec^{2} (x)

단순화하세요:

\frac{sec ( x ) + tan ( x ) - sec ^{2} ( x ) ( cot ( x ) + cos ( x ) )}{cot ( x ) + cos ( x )}

\frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} - sec^{2} (x)

요소를 분수로 변환:

sec^{2} (x) = \frac{sec ^{2} ( x ) ( cot ( x ) + cos ( x ) )}{cot ( x ) + cos ( x )}

= \frac{sec ( x ) + tan ( x )}{cot ( x ) + cos ( x )} - \frac{sec ^{2} ( x ) ( cot ( x ) + cos ( x ) )}{cot ( x ) + cos ( x )}

분모가 같기 때문에, 분수를 합친다:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{sec ( x ) + tan ( x ) - sec ^{2} ( x ) ( cot ( x ) + cos ( x ) )}{cot ( x ) + cos ( x )}

\frac{sec ( x ) + tan ( x ) - sec ^{2} ( x ) ( cot ( x ) + cos ( x ) )}{cot ( x ) + cos ( x )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

sec (x) + tan (x) - sec^{2} (x) (cot (x) + cos (x)) = 0

죄로 표현하라, 왜냐하면

sec (x) + tan (x) - (cos (x) + cot (x)) sec^{2} (x)

기본 삼각형 항등식 사용:

sec (x) = \frac{1}{cos ( x )}

= \frac{1}{cos ( x )} + tan (x) - (cos (x) + cot (x)) (\frac{1}{cos ( x )})^{2}

기본 삼각형 항등식 사용:

tan (x) = \frac{sin ( x )}{cos ( x )}

= \frac{1}{cos ( x )} + \frac{sin ( x )}{cos ( x )} - (cos (x) + cot (x)) (\frac{1}{cos ( x )})^{2}

기본 삼각형 항등식 사용:

cot (x) = \frac{cos ( x )}{sin ( x )}

= \frac{1}{cos ( x )} + \frac{sin ( x )}{cos ( x )} - (cos (x) + \frac{cos ( x )}{sin ( x )}) (\frac{1}{cos ( x )})^{2}

\frac{1}{cos ( x )} + \frac{sin ( x )}{cos ( x )} - (cos (x) + \frac{cos ( x )}{sin ( x )}) (\frac{1}{cos ( x )})^{2}

단순화하세요:

\frac{sin ^{2} ( x ) - 1}{cos ( x ) sin ( x )}

\frac{1}{cos ( x )} + \frac{sin ( x )}{cos ( x )} - (cos (x) + \frac{cos ( x )}{sin ( x )}) (\frac{1}{cos ( x )})^{2}

분수를 합치다

\frac{1}{cos ( x )} + \frac{sin ( x )}{cos ( x )} : \frac{1 + sin ( x )}{cos ( x )}

규칙 적용

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{1 + sin ( x )}{cos ( x )}

= \frac{sin ( x ) + 1}{cos ( x )} - (\frac{1}{cos ( x )})^{2} (\frac{cos ( x )}{sin ( x )} + cos (x))

(cos (x) + \frac{cos ( x )}{sin ( x )}) (\frac{1}{cos ( x )})^{2} = \frac{sin ( x ) + 1}{sin ( x ) cos ( x )}

(cos (x) + \frac{cos ( x )}{sin ( x )}) (\frac{1}{cos ( x )})^{2}

cos (x) + \frac{cos ( x )}{sin ( x )}

합류하다:

\frac{cos ( x ) sin ( x ) + cos ( x )}{sin ( x )}

cos (x) + \frac{cos ( x )}{sin ( x )}

요소를 분수로 변환:

cos (x) = \frac{cos ( x ) sin ( x )}{sin ( x )}

= \frac{cos ( x ) sin ( x )}{sin ( x )} + \frac{cos ( x )}{sin ( x )}

분모가 같기 때문에, 분수를 합친다:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{cos ( x ) sin ( x ) + cos ( x )}{sin ( x )}

= (\frac{1}{cos ( x )})^{2} \frac{cos ( x ) sin ( x ) + cos ( x )}{sin ( x )}

(\frac{1}{cos ( x )})^{2} = \frac{1}{cos ^{2} ( x )}

(\frac{1}{cos ( x )})^{2}

지수 규칙 적용:

(\frac{a}{b})^{c} = \frac{a ^{c}}{b ^{c}}

= \frac{1 ^{2}}{cos ^{2} ( x )}

규칙 적용

1^{a} = 1

1^{2} = 1

= \frac{1}{cos ^{2} ( x )}

= \frac{cos ( x ) sin ( x ) + cos ( x )}{sin ( x )} \cdot \frac{1}{cos ^{2} ( x )}

다중 분수:

\frac{a}{b} \cdot \frac{c}{d} = \frac{a \cdot c}{b \cdot d}

= \frac{( cos ( x ) sin ( x ) + cos ( x ) ) \cdot 1}{sin ( x ) cos ^{2} ( x )}

(cos (x) sin (x) + cos (x)) \cdot 1 = cos (x) sin (x) + cos (x)

(cos (x) sin (x) + cos (x)) \cdot 1

곱하다:

(cos (x) sin (x) + cos (x)) \cdot 1 = (cos (x) sin (x) + cos (x))

= (cos (x) sin (x) + cos (x))

괄호 제거:

(a) = a

= cos (x) sin (x) + cos (x)

= \frac{cos ( x ) sin ( x ) + cos ( x )}{cos ^{2} ( x ) sin ( x )}

공통 용어를 추출하다

cos (x)

= \frac{cos ( x ) ( sin ( x ) + 1 )}{sin ( x ) cos ^{2} ( x )}

공통 요인 취소:

cos (x)

= \frac{sin ( x ) + 1}{sin ( x ) cos ( x )}

= \frac{sin ( x ) + 1}{cos ( x )} - \frac{sin ( x ) + 1}{sin ( x ) cos ( x )}

cos (x), sin (x) cos (x)

의 최소 공배수:

cos (x) sin (x)

cos (x), sin (x) cos (x)

최저공통승수 (LCM)

다음 중 하나에 나타나는 요인으로 구성된 식을 계산합니다

cos (x)

혹은

sin (x) cos (x)

= cos (x) sin (x)

LCM을 기준으로 분수 조정

각 분자를 곱하는 데 필요한 동일한 양으로 곱하시오

해당 분모를 LCM으로 변환합니다

cos (x) sin (x)

위해서

\frac{1 + sin ( x )}{cos ( x )} :

분모와 분자를 곱하다

sin (x)

\frac{1 + sin ( x )}{cos ( x )} = \frac{( 1 + sin ( x ) ) sin ( x )}{cos ( x ) sin ( x )}

= \frac{( 1 + sin ( x ) ) sin ( x )}{cos ( x ) sin ( x )} - \frac{sin ( x ) + 1}{cos ( x ) sin ( x )}

분모가 같기 때문에, 분수를 합친다:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{( 1 + sin ( x ) ) sin ( x ) - ( sin ( x ) + 1 )}{cos ( x ) sin ( x )}

(1 + sin (x)) sin (x) - (sin (x) + 1)

확대한다:

sin^{2} (x) - 1

(1 + sin (x)) sin (x) - (sin (x) + 1)

= sin (x) (1 + sin (x)) - (sin (x) + 1)

sin (x) (1 + sin (x))

확대한다:

sin (x) + sin^{2} (x)

sin (x) (1 + sin (x))

분배 법칙 적용:

a (b + c) = ab + a c

a = sin (x), b = 1, c = sin (x)

= sin (x) \cdot 1 + sin (x) sin (x)

= 1 \cdot sin (x) + sin (x) sin (x)

1 \cdot sin (x) + sin (x) sin (x)

단순화하세요:

sin (x) + sin^{2} (x)

1 \cdot sin (x) + sin (x) sin (x)

1 \cdot sin (x) = sin (x)

1 \cdot sin (x)

곱하다:

1 \cdot sin (x) = sin (x)

= sin (x)

sin (x) sin (x) = sin^{2} (x)

sin (x) sin (x)

지수 규칙 적용:

a^{b} \cdot a^{c} = a^{b + c}

sin (x) sin (x) = sin^{1 + 1} (x)

= sin^{1 + 1} (x)

숫자 추가:

1 + 1 = 2

= sin^{2} (x)

= sin (x) + sin^{2} (x)

= sin (x) + sin^{2} (x)

= sin (x) + sin^{2} (x) - (sin (x) + 1)

- (sin (x) + 1) : - sin (x) - 1

- (sin (x) + 1)

괄호 배포

= - (sin (x)) - (1)

마이너스 플러스 규칙 적용

+ (- a) = - a

= - sin (x) - 1

= sin (x) + sin^{2} (x) - sin (x) - 1

유사 요소 추가:

sin (x) - sin (x) = 0

= sin^{2} (x) - 1

= \frac{sin ^{2} ( x ) - 1}{cos ( x ) sin ( x )}

= \frac{sin ^{2} ( x ) - 1}{cos ( x ) sin ( x )}

\frac{- 1 + sin ^{2} ( x )}{cos ( x ) sin ( x )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

- 1 + sin^{2} (x) = 0

대체로 해결

- 1 + sin^{2} (x) = 0

하게:

sin (x) = u

- 1 + u^{2} = 0

- 1 + u^{2} = 0 : u = 1, u = - 1

- 1 + u^{2} = 0

1

를 오른쪽으로 이동

- 1 + u^{2} = 0

더하다

1

양쪽으로

- 1 + u^{2} + 1 = 0 + 1

단순화

u^{2} = 1

u^{2} = 1

위해서

x^{2} = f (a)

해결책은

x = f (a), - f (a)

u = 1, u = - 1

1 = 1

1

규칙 적용

1 = 1

= 1

- 1 = - 1

- 1

규칙 적용

1 = 1

= - 1

u = 1, u = - 1

뒤로 대체

u = sin (x)

sin (x) = 1, sin (x) = - 1

sin (x) = 1, sin (x) = - 1

sin (x) = 1 : x = \frac{π}{2} + 2 πn

sin (x) = 1

일반 솔루션

sin (x) = 1

sin (x)

주기율표

2 πn

주기:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

x = \frac{π}{2} + 2 πn

x = \frac{π}{2} + 2 πn

sin (x) = - 1 : x = \frac{3 π}{2} + 2 πn

sin (x) = - 1

일반 솔루션

sin (x) = - 1

sin (x)

주기율표

2 πn

주기:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

x = \frac{3 π}{2} + 2 πn

x = \frac{3 π}{2} + 2 πn

모든 솔루션 결합

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

방정식이 정의되지 않았기 때문에:

\frac{π}{2} + 2 πn, \frac{3 π}{2} + 2 πn

솔루션 없음 x \in R

그래프

인기 있는 예

cos (x) = csc (x)

1+cos(2t)=cos^2(t)

1 + cos (2 t) = cos^{2} (t)

2sin(2x+(3pi)/2)+1=0

2 sin (2 x + \frac{3 π}{2}) + 1 = 0

2cos(2x)-sin(x)-1=0

2 cos (2 x) - sin (x) - 1 = 0

2cos^2(θ)-2sin^2(θ)=sqrt(2)

2 cos^{2} (θ) - 2 sin^{2} (θ) = 2