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受欢迎的三角函数 >

sec(x)=-5/2

解答

sec (x) = - \frac{5}{2}

解答

x = 1.98231 \dots + 2 πn, x = - 1.98231 \dots + 2 πn

+1

度数

x = 113.57817 \dots^{\circ} + 36 0^{\circ} n, x = - 113.57817 \dots^{\circ} + 36 0^{\circ} n

求解步骤

sec (x) = - \frac{5}{2}

使用反三角函数性质

sec (x) = - \frac{5}{2}

sec (x) = - \frac{5}{2}

的通解

sec (x) = - a \Rightarrow x = arcsec (- a) + 2 πn, x = - arcsec (- a) + 2 πn

x = arcsec (- \frac{5}{2}) + 2 πn, x = - arcsec (- \frac{5}{2}) + 2 πn

x = arcsec (- \frac{5}{2}) + 2 πn, x = - arcsec (- \frac{5}{2}) + 2 πn

以小数形式表示解

x = 1.98231 \dots + 2 πn, x = - 1.98231 \dots + 2 πn

作图

流行的例子

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csc^{2} (θ) - 2 = 0

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2 sin^{2} (x) + 11 cos (x) = 7

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