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受欢迎的三角函数 >

tan(2x-n/4)=-1,0<x<= 360

解答

tan (2 x - \frac{n}{4}) = - 1, 0^{\circ} < x \leq 36 0^{\circ}

解答

x \in R 无解

求解步骤

tan (2 x - \frac{n}{4}) = - 1, 0^{\circ} < x \leq 36 0^{\circ}

tan (2 x - \frac{n}{4}) = - 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 - \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} n

2 x - \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} n

解

2 x - \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} k : x = \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

2 x - \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} k

将

\frac{n}{4}

到右边

2 x - \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} k

两边加上

\frac{n}{4}

2 x - \frac{n}{4} + \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} k + \frac{n}{4}

化简

2 x - \frac{n}{4} + \frac{n}{4} = 13 5^{\circ} + 18 0^{\circ} k + \frac{n}{4}

化简

2 x - \frac{n}{4} + \frac{n}{4} : 2 x

2 x - \frac{n}{4} + \frac{n}{4}

同类项相加:

- \frac{n}{4} + \frac{n}{4} = 0

= 2 x

化简

13 5^{\circ} + 18 0^{\circ} k + \frac{n}{4} : \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

13 5^{\circ} + 18 0^{\circ} k + \frac{n}{4}

合并分式

13 5^{\circ} + \frac{n}{4} : \frac{54 0 ^{\circ} + n}{4}

使用法则

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

= \frac{54 0 ^{\circ} + n}{4}

= \frac{n + 54 0 ^{\circ}}{4} + 18 0^{\circ} k

= \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

2 x = \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

2 x = \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

2 x = \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

两边除以

2

2 x = \frac{54 0 ^{\circ} + n}{4} + 18 0^{\circ} k

两边除以

2

\frac{2 x}{2} = \frac{\frac{54 0 ^{\circ} + n}{4}}{2} + \frac{18 0 ^{\circ} k}{2}

化简

\frac{2 x}{2} = \frac{\frac{54 0 ^{\circ} + n}{4}}{2} + \frac{18 0 ^{\circ} k}{2}

化简

\frac{2 x}{2} : x

\frac{2 x}{2}

数字相除:

\frac{2}{2} = 1

= x

化简

\frac{\frac{54 0 ^{\circ} + n}{4}}{2} + \frac{18 0 ^{\circ} k}{2} : \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

\frac{\frac{54 0 ^{\circ} + n}{4}}{2} + \frac{18 0 ^{\circ} k}{2}

\frac{\frac{54 0 ^{\circ} + n}{4}}{2} = \frac{54 0 ^{\circ} + n}{8}

\frac{\frac{54 0 ^{\circ} + n}{4}}{2}

使用分式法则:

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

= \frac{54 0 ^{\circ} + n}{4 \cdot 2}

数字相乘:

4 \cdot 2 = 8

= \frac{54 0 ^{\circ} + n}{8}

= \frac{n + 54 0 ^{\circ}}{8} + \frac{18 0 ^{\circ} k}{2}

x = \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

x = \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

x = \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

x = \frac{54 0 ^{\circ} + n}{8} + \frac{18 0 ^{\circ} k}{2}

在

0 < x \leq 36 0^{\circ}

范围内的解

x \in R 无解

作图

流行的例子

tan(θ)=-1,0<= θ<= 2pi

tan (θ) = - 1, 0 \leq θ \leq 2 π

0.85=(1-sin(x))/(1+sin(x))

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

sin (θ) = 0.12

2 sec (x) - 2 = 0

(tan(x))(sin^2(x)-a)(sec(x)-a)=0

(tan (x)) (sin^{2} (x) - a) (sec (x) - a) = 0