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受欢迎的三角函数 >

cos(x)=0.85

解答

cos (x) = 0.85

解答

x = 0.55481 \dots + 2 πn, x = 2 π - 0.55481 \dots + 2 πn

+1

度数

x = 31.78833 \dots^{\circ} + 36 0^{\circ} n, x = 328.21166 \dots^{\circ} + 36 0^{\circ} n

求解步骤

cos (x) = 0.85

使用反三角函数性质

cos (x) = 0.85

cos (x) = 0.85

的通解

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (0.85) + 2 πn, x = 2 π - arccos (0.85) + 2 πn

x = arccos (0.85) + 2 πn, x = 2 π - arccos (0.85) + 2 πn

以小数形式表示解

x = 0.55481 \dots + 2 πn, x = 2 π - 0.55481 \dots + 2 πn

作图

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