展开 u(t-2pi)sin(t)

解答

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u (t - 2 π) sin (t)

u t sin (t) - 2 π u sin (t)

求解步骤

u (t - 2 π) sin (t)

= u sin (t) (t - 2 π)

使用分配律:

a (b - c) = ab - a c

a = u sin (t), b = t, c = 2 π

= u sin (t) t - u sin (t) \cdot 2 π

= u t sin (t) - 2 π u sin (t)

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

e x p an d p^{\frac{3}{5}} (p^{\frac{2}{5}} - 3 p^{\frac{12}{5}})

s im pl i f y (1 + x - 1) \cdot (1 - x - 1)

e x p an d 2 (9 π - 18)

e x p an d lo g_{10} (\frac{x - 1}{x + 1})