展开 (sin(a)-cot(a)(1-cos(a)))/(1-cos(a))

解答

展开

\frac{sin ( a ) - cot ( a ) ( 1 - cos ( a ) )}{1 - cos ( a )}

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

求解步骤

\frac{sin ( a ) - cot ( a ) ( 1 - cos ( a ) )}{1 - cos ( a )}

乘开

sin (a) - cot (a) (1 - cos (a)) : sin (a) - cot (a) + cot (a) cos (a)

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

e x p an d R (3, - 2, - 6) y S (5, 1, - 9)

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

e x p an d \frac{1}{( x + i y ) ^{3} - 2 ( x + i y ) ^{2} + 2 ( x + i y )}

\frac{d}{d x} ((z) (9 x y z - e^{z}))

e x p an d \frac{( m + n ) ^{2}}{m - n}