展开 cos^2(x)(sec^2(x)+csc^2(x))

解答

展开

cos^{2} (x) (sec^{2} (x) + csc^{2} (x))

cos^{2} (x) sec^{2} (x) + cos^{2} (x) csc^{2} (x)

求解步骤

cos^{2} (x) (sec^{2} (x) + csc^{2} (x))

使用分配律:

a (b + c) = ab + a c

cos^{2} (x) (sec^{2} (x) + csc^{2} (x)) = cos^{2} (x) sec^{2} (x) + cos^{2} (x) csc^{2} (x)

= cos^{2} (x) sec^{2} (x) + cos^{2} (x) csc^{2} (x)

e x p an d \frac{3 ( - y + 31 )}{2}

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

e x p an d (3 π (1 - t) + 3) (- \frac{π}{2})

e x p an d \frac{2 ( 3 - 2 46 )}{5}

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