Question

Спростити вираз $\frac{1-cos^{2}\alpha }{tgx^{2} \alpha }$

Answer 1

$\frac{1-cos^{2}a }{tgx^{2} a\\}$

$\frac{sin(a)^{2} }{(\frac{sin(a)}{cos(a)})^{2} }$

$\frac{sin(a)^{2} }{\frac{sin(a)^{2} }{cos(a)^{2} } }$

$cos(a)^{2}$