展开 v(2-sin((pi(t-60))/(120)))

解答

展开

v (2 - sin (\frac{π ( t - 60 )}{120}))

2 v - v sin (\frac{π t - 60 π}{120})

求解步骤

v (2 - sin (\frac{π ( t - 60 )}{120}))

使用分配律:

a (b - c) = ab - a c

a = v, b = 2, c = sin (\frac{π ( t - 60 )}{120})

= v \cdot 2 - v sin (\frac{π ( t - 60 )}{120})

= 2 v - v sin (\frac{π ( t - 60 )}{120})

\frac{π ( t - 60 )}{120} = \frac{π t - 60 π}{120}

= 2 v - v sin (\frac{π t - 60 π}{120})

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