Question

use the co function identities to evaluate expression cos^2 63+cos^2 49+cos^2 27+ cos^2 41

Answer 1

Hello

Answer 2

pls help

Answer 3

since \(90-27=63\) you have
\[\cos(27)=-\sin(63)\]

Answer 4

and so
\[\cos^2(63)+\sin^2(63)=1\]

Answer 5

bet the other part gives \(1\) as well by the same reason

Answer 6

thank you! is there anyway you can explain further. like how did you know which number to use?