展开 sin(θ)(0,-5)

解答

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sin (θ) (0, - 5)

0 \cdot sin (θ), - 5 sin (θ)

求解步骤

sin (θ) (0, - 5)

= (0, - 5) sin (θ)

使用分配律:

a (b - c) = ab - a c

a = sin (θ), b = 0,, c = 5

= sin (θ) \cdot 0, - sin (θ) \cdot 5

= 0 \cdot sin (θ), - 5 sin (θ)

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