Question

Simplifique a expressão:
Y- cos 2a + sen²a=

Answer 1

Resposta:

$Y-cos(2a)+sen^2(a)$

$Y-[cos^2(a)-sen^2(a)]+[1-sen^2(a)]$

$Y-cos^2(a)+sen^2(a)-sen^2(a)+1$

$Y-cos^2(a)+1$

$Y+1-cos^2(a)$

$Y+sen^2(a)$