Question

Упрастите выражение: cos($\pi$+$\alpha$)+sin($\frac{3}{2}$$\pi$-$\alpha$)

Answer 1

Cos(pi+a)+sin(3/2 pi -a)

cos(pi+a)=-cos(a)

-cos(a)-cos(a)

-1cos(a)-1cos(a)

(-1-1)*cos(a)

-2cos(a)