展开 (sin^2(a)(1+cos(a)))/(1-cos(a))

解答

展开

\frac{sin ^{2} ( a ) ( 1 + cos ( a ) )}{1 - cos ( a )}

\frac{sin ^{2} ( a ) + sin ^{2} ( a ) cos ( a )}{1 - cos ( a )}

求解步骤

\frac{sin ^{2} ( a ) ( 1 + cos ( a ) )}{1 - cos ( a )}

乘开

sin^{2} (a) (1 + cos (a)) : sin^{2} (a) + sin^{2} (a) cos (a)

= \frac{sin ^{2} ( a ) + sin ^{2} ( a ) cos ( a )}{1 - cos ( a )}

e x p an d x^{4} (5 - x^{2}) d x

e x p an d A (2, - 3) B (6, - 2)

e x p an d (4, 6) y (1, - 3)

s im pl i f y \frac{z ^{3}}{( z - i ) ^{2} ( z + 3 i ) ^{3}}

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