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Sasha3951 @Sasha3951

October 2021 1 42 Report

Упростить:
А) [tex]2sina+\frac{2cosa^{2} }{1+sina}[/tex]
Б) [tex]1+sin(\pi +a) * cos(a+\frac{3\pi }{2} )-cosa^{2}[/tex]

Answers & Comments

spidchek

А)

$2 \sin( \alpha ) + \frac{2 \times (1 - \sin( \alpha {}^{2}) ) }{1 + \sin( \alpha ) }$

$2 \sin( \alpha ) + \frac{2 \times (1 - \sin( \ { \alpha } \times (1 + \sin( \alpha ) ) }{1 + \sin( \alpha ) }$

$2 \sin( \alpha ) + 2(1 - \sin( \alpha ) )$

2sin(a)+2-2sin(a)=2

Б)

$1 + \sin(\pi + \alpha ) \times \cos( + \frac{3\pi}{2} ) - \cos( { \alpha }^{2} )$

$1 - \sin( \alpha ) \times \sin( \alpha ) - \cos( \alpha )$

$1 - \sin( { \alpha }^{2} ) - \cos( { \alpha }^{2} )$

1-1=0

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