展开 W(sin(60)+0.22cos(60)=55.2754)

解答

展开

W (sin (6 0^{\circ}) + 0.22 cos (6 0^{\circ}) = 55.2754)

0.97602 \dots W = 55.2754

求解步骤

W (sin (6 0^{\circ}) + 0.22 cos (6 0^{\circ}) = 55.2754)

= (sin (6 0^{\circ}) + 0.22 \cdot 55.2754 cos (6 0^{\circ}) =) W

使用分配律:

a (b + c) = ab + a c

a = W, b = sin (6 0^{\circ}), c = 0.22 cos (6 0^{\circ}) = 55.2754

W sin (6 0^{\circ}) + W \cdot 0.22 cos (6 0^{\circ}) = 55.2754

sin (6 0^{\circ}) W + 0.22 cos (6 0^{\circ}) W = 55.2754

乘开

sin (6 0^{\circ}) W + 0.22 cos (6 0^{\circ}) W : 0.97602 \dots W

0.97602 \dots W = 55.2754

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