Question

sin a\1+cos a + sin a\1-cos a​

Answer 1

(sin a(1-cos a)+sina(1+ cos a)) /( 1 - $cos^{2} a$)

(sin a(1-cos a)+sina(1+ cos a)) /$sin^{2} a$

(1-cos a +1 +cos a)/sin a

1/sin a - Ответ