Question

Cos^2 45 degrees + sin^2 60 degrees + sin^2 30 degrees
Plz do the sum fast it's needed

Answer 1

$cos^245^o+sin^260^o+sin^230^o\\ \\=( \frac{1}{ \sqrt{2} } )^2+( \frac{ \sqrt{3} }{ 2 } )^2+( \frac{1}{2})^2\\ \\= \frac{1}{2}+\frac{3}{4}+\frac{1}{4}\\ \\= \frac{2+3+1}{4}= \frac{6}{4}\\ \\= \frac{3}{2}$

Answer 2

cos²45°+sin²45°+sin²30°
(1/√2)²+(1/√2)²+(1/2)²
1/2+1/2+1/4
5/4