化简 (3-2cos(t))*(-2sin(t))

解答

化简

(3 - 2 cos (t)) \cdot (- 2 sin (t))

- 2 sin (t) (3 - 2 cos (t))

求解步骤

(3 - 2 cos (t)) (- 2 sin (t))

使用法则:

a (- b) = - ab

(3 - 2 cos (t)) (- 2 sin (t)) = - (3 - 2 cos (t)) \cdot 2 sin (t)

= - (3 - 2 cos (t)) \cdot 2 sin (t)

= - 2 sin (t) (3 - 2 cos (t))

e x p an d \frac{4 ( s + 6 )}{s ( s ^{2} + 9 s )}

e x p an d, A (2, - 3) Y B (- 2, 3)

e x p an d \frac{d}{d x} ((x + 1) (x^{2} - 55 x)) + 1015 x - 5542

e x p an d \frac{n ( n - 1 ) ( n - 2 )}{6}

e x p an d \frac{2 s ^{2} + 79 s + 308}{( s - 4 ) ( s ^{2} + 10 s + 26 )}