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受欢迎的三角函数 >

tan(2x-5)=sin^2(30)+sin^2(60)

解答

tan (2 x - 5) = sin^{2} (3 0^{\circ}) + sin^{2} (6 0^{\circ})

解答

x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

+1

弧度

x = \frac{5}{2} + \frac{π}{8} + \frac{π}{2} n

求解步骤

tan (2 x - 5) = sin^{2} (3 0^{\circ}) + sin^{2} (6 0^{\circ})

sin (3 0^{\circ}) = \frac{1}{2}

sin (3 0^{\circ})

使用以下普通恒等式:

sin (3 0^{\circ}) = \frac{1}{2}

sin (3 0^{\circ})

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}

= \frac{1}{2}

= \frac{1}{2}

sin (6 0^{\circ}) = \frac{3}{2}

sin (6 0^{\circ})

使用以下普通恒等式:

sin (6 0^{\circ}) = \frac{3}{2}

sin (6 0^{\circ})

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}

= \frac{3}{2}

= \frac{3}{2}

tan (2 x - 5) = (\frac{1}{2})^{2} + (\frac{3}{2})^{2}

化简

(\frac{1}{2})^{2} + (\frac{3}{2})^{2} : 1

(\frac{1}{2})^{2} + (\frac{3}{2})^{2}

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

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

使用指数法则:

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

= \frac{1 ^{2}}{2 ^{2}}

使用法则

1^{a} = 1

1^{2} = 1

= \frac{1}{2 ^{2}}

(\frac{3}{2})^{2} = \frac{3}{2 ^{2}}

(\frac{3}{2})^{2}

使用指数法则:

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

= \frac{( 3 ) ^{2}}{2 ^{2}}

(3)^{2} : 3

使用根式运算法则:

a = a^{\frac{1}{2}}

= (3^{\frac{1}{2}})^{2}

使用指数法则:

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

= 3^{\frac{1}{2} \cdot 2}

\frac{1}{2} \cdot 2 = 1

\frac{1}{2} \cdot 2

分式相乘:

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

= \frac{1 \cdot 2}{2}

约分:

2

= 1

= 3

= \frac{3}{2 ^{2}}

= \frac{1}{2 ^{2}} + \frac{3}{2 ^{2}}

使用法则

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

= \frac{1 + 3}{2 ^{2}}

数字相加:

1 + 3 = 4

= \frac{4}{2 ^{2}}

分解

4 : 2^{2}

因式分解

4 = 2^{2}

= \frac{2 ^{2}}{2 ^{2}}

约分:

2^{2}

= 1

tan (2 x - 5) = 1

的通解

tan (x)

周期表（周期为

18 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} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

2 x - 5 = 4 5^{\circ} + 18 0^{\circ} n

2 x - 5 = 4 5^{\circ} + 18 0^{\circ} n

解

2 x - 5 = 4 5^{\circ} + 18 0^{\circ} n : x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

2 x - 5 = 4 5^{\circ} + 18 0^{\circ} n

将

5

到右边

2 x - 5 = 4 5^{\circ} + 18 0^{\circ} n

两边加上

5

2 x - 5 + 5 = 4 5^{\circ} + 18 0^{\circ} n + 5

化简

2 x = 4 5^{\circ} + 18 0^{\circ} n + 5

2 x = 4 5^{\circ} + 18 0^{\circ} n + 5

两边除以

2

2 x = 4 5^{\circ} + 18 0^{\circ} n + 5

两边除以

2

\frac{2 x}{2} = \frac{4 5 ^{\circ}}{2} + \frac{18 0 ^{\circ} n}{2} + \frac{5}{2}

化简

\frac{2 x}{2} = \frac{4 5 ^{\circ}}{2} + \frac{18 0 ^{\circ} n}{2} + \frac{5}{2}

化简

\frac{2 x}{2} : x

\frac{2 x}{2}

数字相除:

\frac{2}{2} = 1

= x

化简

\frac{4 5 ^{\circ}}{2} + \frac{18 0 ^{\circ} n}{2} + \frac{5}{2} : \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

\frac{4 5 ^{\circ}}{2} + \frac{18 0 ^{\circ} n}{2} + \frac{5}{2}

对同类项分组

= \frac{5}{2} + \frac{18 0 ^{\circ} n}{2} + \frac{4 5 ^{\circ}}{2}

\frac{4 5 ^{\circ}}{2} = 22. 5^{\circ}

\frac{4 5 ^{\circ}}{2}

使用分式法则:

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

= \frac{18 0 ^{\circ}}{4 \cdot 2}

数字相乘:

4 \cdot 2 = 8

= 22. 5^{\circ}

= \frac{5}{2} + \frac{18 0 ^{\circ} n}{2} + 22. 5^{\circ}

对同类项分组

= \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

x = \frac{5}{2} + 22. 5^{\circ} + \frac{18 0 ^{\circ} n}{2}

作图

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