展开 (10)(cos(t)+isin(t))

解答

展开

(10) (cos (t) + i sin (t))

10 cos (t) + 10 sin (t) i

求解步骤

(10) (cos (t) + i sin (t))

使用法则:

(a) = a

(10) = 10

= 10 (cos (t) + i sin (t))

使用分配律:

a (b + c) = ab + a c

10 (cos (t) + i sin (t)) = 10 cos (t) + 10 i sin (t)

= 10 cos (t) + 10 i sin (t)

= 10 cos (t) + 10 sin (t) i

e x p an d (cos^{4} (t) - \frac{2}{3} cos^{6} (t)) cos (2 t)

e x p an d d x (x - 3) (y - 4)

s im pl i f y i (x + y i)^{2}

e x p an d lo g_{4} (10 x)

s im pl i f y (4 + \frac{37044}{x ^{3}}) x^{2}