Question

plz tell solution step by step solution plz.. ​

Answer 1

sin^2(20)+cos^2(90-20)

=sin^2(20)+cos^2(20)

=1.

Answer 2

hey mate here is your answer

⤵⤵⤵⤵⤵⤵⤵⤵

sin^2 20 + sin^2 70

sin^2 20 + sin^2 ( 90 - 20)

sin^2 20 + cos^2 20

1

i hope it helps you