Question

Sin^2 31 + sin^2 59 =...
tolong pakai cara

Answer 1

Sin^2 31 + sin^2 59
= 1 - cos^2 31 + sin^2 59
= 1 - cos^2 (90-59) + sin^2 59
= 1 - sin^2 59 + sin^2 59
= 1