Упростить выражение!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Упростить выражение!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Answer 1

1
2sin4xcos2x/sin4x=2cos2x

2
cos50=sin40
(sin40+sin80)=2sin60cos20=2*√3/2*cos20=√3cos20