展开 f(t)(t,sin(3t)-1,cos(3t))

解答

展开

f (t) (t, sin (3 t) - 1, cos (3 t))

f (t) t, sin (3 t) - 1 \cdot f (t), cos (3 t)

求解步骤

f (t) (t, sin (3 t) - 1, cos (3 t))

= f (t) (, t sin (3 t) - 1, cos (3 t))

使用分配律:

a (b - c) = ab - a c

a = f (t), b = t, sin (3 t), c = 1, cos (3 t)

= f (t) t, sin (3 t) - f (t) \cdot 1, cos (3 t)

= f (t) t, sin (3 t) - 1 \cdot f (t), cos (3 t)

s im pl i f y \frac{- \frac{12}{4} - 45}{24} - 2 (- 3 + 5)

e x p an d \frac{x ^{3} - 9 x + c}{( x - 1 ) ^{2}}

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

s im pl i f y (x + 3) \cdot 3 x

e x p an d \frac{x ( - 3 x ^{4} + 10 x ^{2} - 3 )}{3 ( x ^{2} + 1 ) ^{6}}