展开 csc(x)(csc(x)-cos^2(*csc(x)))

解答

展开

csc (x) (csc (x) - cos^{2} (\cdot csc (x)))

csc^{2} (x) - cos^{2} (csc (x)) csc (x)

求解步骤

csc (x) (csc (x) - cos^{2} (csc (x)))

使用分配律:

a (b - c) = ab - a c

csc (x) (csc (x) - cos^{2} (csc (x))) = csc (x) csc (x) - csc (x) cos^{2} (csc (x))

= csc (x) csc (x) - csc (x) cos^{2} (csc (x))

化简

csc (x) csc (x) - csc (x) cos^{2} (csc (x)) : csc^{2} (x) - cos^{2} (csc (x)) csc (x)

= csc^{2} (x) - cos^{2} (csc (x)) csc (x)

s im pl i f y (2 - 3 i)^{5}

e x p an d (\frac{3 a}{2 b} + \frac{4 b ^{2}}{5})^{3}

e x p an d (x - \frac{2}{x})^{10}

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

e x p an d (4, 2, - 3, 5, - 1) l e f t (2, 6, - 1, - 4, 8)