化简 (-cot(x)csc(x))(2csc(x)-1)

解答

化简

(- cot (x) csc (x)) (2 csc (x) - 1)

- cot (x) csc (x) (2 csc (x) - 1)

求解步骤

(- cot (x) csc (x)) (2 csc (x) - 1)

使用法则:

(- a) = - a

(- cot (x) csc (x)) = - cot (x) csc (x)

= - cot (x) csc (x) (2 csc (x) - 1)

e x p an d (y + Δ)^{3}

\frac{d}{d x} ((3) (- x^{2} + 2 5 x^{2}))

e x p an d \frac{x ^{4} + y ^{4}}{x y ( y ^{2} + x ^{2} )}

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

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