展开 sin(2(t-pi))

解答

展开

sin (2 (t - π))

sin (2 t)

求解步骤

sin (2 (t - π))

乘开

2 (t - π) : 2 t - 2 π

= sin (2 t - 2 π)

使用三角恒等式改写

= sin (2 t)

e x p an d \frac{\frac{d}{d x} ( ( 2 x + 7 ) ( x ^{2} + 3 ) )}{( 3 x + 5 )}

\frac{d ^{2}}{d x ^{2}} ((y) (x + 10 x^{2}))

s im pl i f y (\frac{x + 7}{x} + 3 x) 10

e x p an d \frac{6}{( x + 4 ) ( x - 1 )}

e x p an d A (- 13, - 15) y B (5, - 19)