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受欢迎的三角函数 >

cos(B)= 3/8

解答

cos (B) = \frac{3}{8}

解答

B = 1.18639 \dots + 2 πn, B = 2 π - 1.18639 \dots + 2 πn

+1

度数

B = 67.97568 \dots^{\circ} + 36 0^{\circ} n, B = 292.02431 \dots^{\circ} + 36 0^{\circ} n

求解步骤

cos (B) = \frac{3}{8}

使用反三角函数性质

cos (B) = \frac{3}{8}

cos (B) = \frac{3}{8}

的通解

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

B = arccos (\frac{3}{8}) + 2 πn, B = 2 π - arccos (\frac{3}{8}) + 2 πn

B = arccos (\frac{3}{8}) + 2 πn, B = 2 π - arccos (\frac{3}{8}) + 2 πn

以小数形式表示解

B = 1.18639 \dots + 2 πn, B = 2 π - 1.18639 \dots + 2 πn

作图

流行的例子

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