zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的三角函数 >

sin(x)cos(x-60)=0

解答

sin (x) cos (x - 6 0^{\circ}) = 0

解答

x = 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 15 0^{\circ}, x = 36 0^{\circ} n + 33 0^{\circ}

+1

弧度

x = 0 + 2 πn, x = π + 2 πn, x = \frac{5 π}{6} + 2 πn, x = \frac{11 π}{6} + 2 πn

求解步骤

sin (x) cos (x - 6 0^{\circ}) = 0

分别求解每个部分

sin (x) = 0 or cos (x - 6 0^{\circ}) = 0

sin (x) = 0 : x = 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n

sin (x) = 0

sin (x) = 0

的通解

sin (x)

周期表（周期为

36 0^{\circ} n

"）：

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

x = 0 + 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n

x = 0 + 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n

解

x = 0 + 36 0^{\circ} n : x = 36 0^{\circ} n

x = 0 + 36 0^{\circ} n

0 + 36 0^{\circ} n = 36 0^{\circ} n

x = 36 0^{\circ} n

x = 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n

cos (x - 6 0^{\circ}) = 0 : x = 36 0^{\circ} n + 15 0^{\circ}, x = 36 0^{\circ} n + 33 0^{\circ}

cos (x - 6 0^{\circ}) = 0

cos (x - 6 0^{\circ}) = 0

的通解

cos (x)

周期表（周期为

36 0^{\circ} n

）：

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

x - 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n

x - 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n, x - 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n

解

x - 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n : x = 36 0^{\circ} n + 15 0^{\circ}

x - 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 9 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

9 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 36 0^{\circ} n + 15 0^{\circ}

9 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 36 0^{\circ} n + 9 0^{\circ} + 6 0^{\circ}

2, 3

的最小公倍数:

6

2, 3

最小公倍数 (LCM)

2

质因数分解:

2

2

2

是质数，因此无法因数分解

= 2

3

质因数分解:

3

3

3

是质数，因此无法因数分解

= 3

将每个因子乘以它在

2

或

3

中出现的最多次数

= 2 \cdot 3

数字相乘:

2 \cdot 3 = 6

= 6

根据最小公倍数调整分式

将每个分子乘以其分母转变为最小公倍数所要乘以的同一数值

6

对于

9 0^{\circ} :

将分母和分子乘以

3

9 0^{\circ} = \frac{18 0 ^{\circ} 3}{2 \cdot 3} = 9 0^{\circ}

对于

6 0^{\circ} :

将分母和分子乘以

2

6 0^{\circ} = \frac{18 0 ^{\circ} 2}{3 \cdot 2} = 6 0^{\circ}

= 9 0^{\circ} + 6 0^{\circ}

因为分母相等，所以合并分式:

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

= \frac{18 0 ^{\circ} 3 + 18 0 ^{\circ} 2}{6}

同类项相加:

54 0^{\circ} + 36 0^{\circ} = 90 0^{\circ}

= 36 0^{\circ} n + 15 0^{\circ}

x = 36 0^{\circ} n + 15 0^{\circ}

x = 36 0^{\circ} n + 15 0^{\circ}

x = 36 0^{\circ} n + 15 0^{\circ}

解

x - 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n : x = 36 0^{\circ} n + 33 0^{\circ}

x - 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n

将

6 0^{\circ}

到右边

x - 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n

两边加上

6 0^{\circ}

x - 6 0^{\circ} + 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} = 27 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

化简

x - 6 0^{\circ} + 6 0^{\circ} : x

x - 6 0^{\circ} + 6 0^{\circ}

同类项相加:

- 6 0^{\circ} + 6 0^{\circ} = 0

= x

化简

27 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ} : 36 0^{\circ} n + 33 0^{\circ}

27 0^{\circ} + 36 0^{\circ} n + 6 0^{\circ}

对同类项分组

= 36 0^{\circ} n + 6 0^{\circ} + 27 0^{\circ}

3, 2

的最小公倍数:

6

3, 2

最小公倍数 (LCM)

3

质因数分解:

3

3

3

是质数，因此无法因数分解

= 3

2

质因数分解:

2

2

2

是质数，因此无法因数分解

= 2

将每个因子乘以它在

3

或

2

中出现的最多次数

= 3 \cdot 2

数字相乘:

3 \cdot 2 = 6

= 6

根据最小公倍数调整分式

将每个分子乘以其分母转变为最小公倍数所要乘以的同一数值

6

对于

6 0^{\circ} :

将分母和分子乘以

2

6 0^{\circ} = \frac{18 0 ^{\circ} 2}{3 \cdot 2} = 6 0^{\circ}

对于

27 0^{\circ} :

将分母和分子乘以

3

27 0^{\circ} = \frac{54 0 ^{\circ} 3}{2 \cdot 3} = 27 0^{\circ}

= 6 0^{\circ} + 27 0^{\circ}

因为分母相等，所以合并分式:

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

= \frac{18 0 ^{\circ} 2 + 162 0 ^{\circ}}{6}

同类项相加:

36 0^{\circ} + 162 0^{\circ} = 198 0^{\circ}

= 36 0^{\circ} n + 33 0^{\circ}

x = 36 0^{\circ} n + 33 0^{\circ}

x = 36 0^{\circ} n + 33 0^{\circ}

x = 36 0^{\circ} n + 33 0^{\circ}

x = 36 0^{\circ} n + 15 0^{\circ}, x = 36 0^{\circ} n + 33 0^{\circ}

合并所有解

x = 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n, x = 36 0^{\circ} n + 15 0^{\circ}, x = 36 0^{\circ} n + 33 0^{\circ}

作图

流行的例子

1+cos(a)=(2cos^2(a))/2

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

cos(x)+cos^4(x)= 1/2

cos (x) + cos^{4} (x) = \frac{1}{2}

sin^2(x)=sec(x)

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

5sin^2(x)-11sin(x)+2=0

5 sin^{2} (x) - 11 sin (x) + 2 = 0

3cos^2(x)-sin^2(x)-sin^2(x)=0

3 cos^{2} (x) - sin^{2} (x) - sin^{2} (x) = 0