Answer:
f(x) = -2x + 11
Step-by-step explanation:
okay so if f(-2) = 15 and f(1) = 9
i used desmos to picture it and i got f(x) = -2x + 11
because f(-2) = -2(-2) + 11 = 4 + 11 = 15 so f(-2) = 15
and f(1) = -2(1) + 11 = -2 + 11 = 9 so f(1) = 9
Double angle identity for cosine:

By the Pythagorean theorem, if

, it follows that

:

where we take the positive root because

, and

is non-negative throughout this domain.
So we have
Answer:
17
Step-by-step explanation:
The answer is C
He will get a sum of two
Answer:
i cant see that well. please take a clear photo ;-;
Step-by-step explanation: