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受欢迎的三角函数 >

sin(62.8x+pi/4)=sin(pi/4)

解答

sin (62.8 x + \frac{π}{4}) = sin (\frac{π}{4})

解答

x = \frac{5 πn}{157}, x = \frac{5 πn}{157} + \frac{5 π}{628}

度数

x = 0^{\circ} + 5.73248 \dots^{\circ} n, x = 1.43312 \dots^{\circ} + 5.73248 \dots^{\circ} n

求解步骤

sin (62.8 x + \frac{π}{4}) = sin (\frac{π}{4})

sin (\frac{π}{4}) = \frac{2}{2}

sin (\frac{π}{4})

使用以下普通恒等式:

sin (\frac{π}{4}) = \frac{2}{2}

sin (\frac{π}{4})

sin (x)

周期表（周期为

2 πn

"）：

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}

= \frac{2}{2}

= \frac{2}{2}

sin (62.8 x + \frac{π}{4}) = \frac{2}{2}

sin (62.8 x + \frac{π}{4}) = \frac{2}{2}

的通解

sin (x)

周期表（周期为

2 πn

"）：

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}

62.8 x + \frac{π}{4} = \frac{π}{4} + 2 πn, 62.8 x + \frac{π}{4} = \frac{3 π}{4} + 2 πn

62.8 x + \frac{π}{4} = \frac{π}{4} + 2 πn, 62.8 x + \frac{π}{4} = \frac{3 π}{4} + 2 πn

解

62.8 x + \frac{π}{4} = \frac{π}{4} + 2 πn : x = \frac{5 πn}{157}

62.8 x + \frac{π}{4} = \frac{π}{4} + 2 πn

两边减去

\frac{π}{4}

62.8 x + \frac{π}{4} - \frac{π}{4} = \frac{π}{4} + 2 πn - \frac{π}{4}

化简

62.8 x = 2 πn

在两边乘以

10

62.8 x = 2 πn

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere is one digit to the right of the decimal point, therefore multiply by

10

62.8 x \cdot 10 = 2 πn \cdot 10

整理后得

628 x = 20 πn

628 x = 20 πn

两边除以

628

628 x = 20 πn

两边除以

628

\frac{628 x}{628} = \frac{20 πn}{628}

化简

x = \frac{5 πn}{157}

x = \frac{5 πn}{157}

解

62.8 x + \frac{π}{4} = \frac{3 π}{4} + 2 πn : x = \frac{5 πn}{157} + \frac{5 π}{628}

62.8 x + \frac{π}{4} = \frac{3 π}{4} + 2 πn

在两边乘以

10

62.8 x + \frac{π}{4} = \frac{3 π}{4} + 2 πn

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere is one digit to the right of the decimal point, therefore multiply by