Question

sin^2 9º + sin^2 81° =​

Answer 1

Step-by-step explanation:

sin²(90–thrita)= cos throat

cos²81+sin²81

As we know that sin²+cos²= 1

Therefore 1×81=81

Answer 2

Answer:

${cos81}^{2} = {sin9 }^{2} \\ \\ so \: puting \: values \: \\ {cos81}^{2} + {sin81}^{2} = 1$

1 is the ans