Question

Упростоите выражение:
1-sina*cosa/tga

Answer 1

1 - (sina*cos a) *  ctg a = 1-cos^2a = sin^2 a

Answer 2

$1-sin alpha * frac{cos alpha}{tg alpha } = 1-sin alpha * frac{cos^2 alpha}{sin alpha } = 1-cos^2 alpha=sin^2 alpha$