cos(x)=(0.95293)/(1.36156)

解答

cos (x) = \frac{0.95293}{1.36156}

x = 0.79556 \dots + 2 πn, x = 2 π - 0.79556 \dots + 2 πn

度数

x = 45.58254 \dots^{\circ} + 36 0^{\circ} n, x = 314.41745 \dots^{\circ} + 36 0^{\circ} n

求解步骤

cos (x) = \frac{0.95293}{1.36156}

使用反三角函数性质

cos (x) = \frac{0.95293}{1.36156}

cos (x) = \frac{0.95293}{1.36156}

的通解

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

x = arccos (\frac{0.95293}{1.36156}) + 2 πn, x = 2 π - arccos (\frac{0.95293}{1.36156}) + 2 πn

x = arccos (\frac{0.95293}{1.36156}) + 2 πn, x = 2 π - arccos (\frac{0.95293}{1.36156}) + 2 πn

以小数形式表示解

x = 0.79556 \dots + 2 πn, x = 2 π - 0.79556 \dots + 2 πn

so l v e f or θ, W = F \cdot d \cdot cos (θ)

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