(1-cos a) (1+cos a) реши

Question

(1-cos a) (1+cos a) реши

Comments

1.(1+cos a)(1-cos a)=1-cos^2a=sin^2a 2.2sin x-1=0 sinx=1/2 x1=arcsin1/2+2pk x2=p-arcsin1/2+2pk x1=p/6+2pk x2=p-p/6+2pk=5p/6+2pk

Answer 1

(1-cosa)*(1+cosa)=1-cos^2a=sin^2a.

Answer 2

I hope this helps you



1+cosa-cosa-cos^2a


1-cos^2a


sin^2a