Question

What will be the value of sin²80+cos²80

Answer 1

sin^80°+cos^280°

=1

hope this answer will be helpful

Answer 2

There's an identity that,

${ \sin }^{2} \alpha + { \cos }^{2} \alpha = 1$
So using this relation,
${ \sin }^{2} 80 + { \cos }^{2} 80 = 1$