Question

Sina/(2cos²a/2)........................

Answer 1

Я так думаю, что нужно упростить

Answer 2

$= \frac{ \sin(2 \times \frac{ \alpha }{2} ) }{2 { \cos( \frac{ \alpha }{2} ) }^{2} } = \frac{2 \sin( \frac{ \alpha }{2} ) \cos( \frac{ \alpha }{2} ) }{2 { \cos( \frac{ \alpha }{2} ) }^{2} } = \frac{ \sin( \frac{ \alpha }{2} ) }{ \cos( \frac{ \alpha }{2} ) } = \tan( \frac{ \alpha }{2} )$

Answer 3

It seems like you've provided an incomplete expression. It's missing the second part or the complete equation. As it stands, the expression is:

arduinoCopy code
Sina / (2 * cos²(a/2))

This expression involves trigonometric functions. Sina likely represents the sine of some angle (let's assume it's a), and cos²(a/2) represents the square of the cosine of half the angle a.

If you provide the full equation or context of the problem, I'd be happy to assist further and help you simplify or solve the expression.