Question

Sina*sinb/cosa*cosb * tga*ctgb+1 ПОМОГИИИИТЕ УПРОСТИТЬ

Answer 1

sina/cosa=tga. sinb/cosb=tgb

Sina*sinb/cosa*cosb=tga*tgb. tgb*ctgb=1

Sina*sinb/cosa*cosb*tga*ctgb+1=tga*tgb*tga*ctgb+1=1*tga*tga+1=
=tg^2(a)+1