化简 (cos(θ)-sin(θ))*(cos(θ))

解答

化简

(cos (θ) - sin (θ)) \cdot (cos (θ))

(cos (θ) - sin (θ)) cos (θ)

求解步骤

(cos (θ) - sin (θ)) (cos (θ))

使用法则:

(a) = a

(cos (θ)) = cos (θ)

= (cos (θ) - sin (θ)) cos (θ)

e x p an d \frac{( s + 18 )}{s ( s + 3 ) ( s + 15 ) ( s + 20 )}

s im pl i f y \frac{( - 1 - 3 i ) ^{4}}{16}

s im pl i f y 8 (25 - 2)

e x p an d t sin (t) (cos (t) - t sin (t))

\frac{d}{d t} ((s) (3 t^{2} - sec (t) + 3))