Answer:
gotta be answer A
Step-by-step explanation:
you can search up f(x) = square root of x
It's A ...cos (90- theta) = sin theta
so A
Answer:
-9/20
Step-by-step explanation:
For the first two terms, all you have to do is multiply the numerators and the denominators, and cancel out the negative, but because there is a -1 after that, the negative sign comes back, although the -1 doesn't really change the number.