展开 cosh(k(z+h))

解答

展开

cosh (k (z + h))

cosh (k z + kh)

求解步骤

cosh (k (z + h))

乘开

k (z + h) : k z + kh

= cosh (k z + kh)

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

e x p an d tan (x) + sin (x) (csc (x) - sec (x) = 1)

e x p an d (2 x^{3} + 4 x y^{2} + y^{2}) d x + (2 x y + 4 x^{2} y) d y

s im pl i f y (\frac{1}{3} + \frac{x}{2}) (\frac{1}{9} - \frac{x ^{2}}{4}) (\frac{1}{3} - \frac{x}{2})

s im pl i f y x (\frac{3 x}{4} + \frac{10 - 3 x}{2})