Question

Arăți ca sin pătrat 150 ° +sin pătrat 60° = 1

Answer 1

$sin(150)^{2}=0.25$,iar$sin(60)^{2}=0.75$,deci
$sin(150)^{2}+sin(60)^{2} =1$

Answer 2

sin 150°=sin(180°-30°)=sin30°
sin²30°+sin²60°=sin²30°+cos°30°=1