Question

Giải giúp mk vs mik cần gấp lắm!!!!!!!!!!!!!!!!

Answer 1

\(=\left(sin^210^o+sin^280^o\right)+\left(sin^220^o+sin^270^o\right)+\left(sin^230^o+sin^260^o\right)\\ =\left(sin^210^o+cos^210^o\right)+\left(sin^220^o+cos^220^o\right)+\left(sin^230^o+cos^230^o\right)\\ =1+1+1=3\)