tan(A)= 67/94

解答

tan (A) = \frac{67}{94}

A = 0.61924 \dots + πn

度数

A = 35.47997 \dots^{\circ} + 18 0^{\circ} n

求解步骤

tan (A) = \frac{67}{94}

使用反三角函数性质

tan (A) = \frac{67}{94}

tan (A) = \frac{67}{94}

的通解

tan (x) = a \Rightarrow x = arctan (a) + πn

A = arctan (\frac{67}{94}) + πn

A = arctan (\frac{67}{94}) + πn

以小数形式表示解

A = 0.61924 \dots + πn

sin (8 x) - 2 cos (4 x) = 0

1.812 = 316 \cdot cos (1.496 \cdot x) + 1.496

so l v e f or t, cos (wt + d) = 0

sin (θ) = 3 cos (θ), 0 \leq θ < 2 π

cos (2 x) - \frac{1}{3} cos (x) = 0