化简 2(1+cos(x))

解答

化简

2 (1 + cos (x))

2 + 2 cos (x)

求解步骤

2 (1 + cos (x))

展开

2 (1 + cos (x)) : 2 + 2 cos (x)

= 2 + 2 cos (x)

e x p an d sin (x - \frac{3 π}{4})

e x p an d (- 1, - 3) y (2, - 5)

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

\frac{d}{d m} ((r (m)) (m^{2} (\frac{c}{2} - \frac{m}{3})))

e x p an d \frac{x ^{2} ( y - 1 ) cos ( \frac{4}{y - 1} )}{x ^{2} + 3 ( y - 1 ) ^{2}}