E and F
note that x² + 8x + 16 is a perfect square which factors as ( x + 4 )², thus
(x + 4 )² = 7 ( take the square root of both sides )
x + 4 = ± √7 ( note plus or minus )
subtract 4 from both sides )
x = ± √7 - 4
x = √7 - 4 → E
x = - √7 - 4 → F
Arc secant is not equal to cosine. It can be confusing, because the "-1" exponent (which is used to denote arc secant), could also mean the inverse function of secant. Yes, the inverse function of secant would be cosine. Therefore, the inverse of the inverse of cosine, is simply cosine itself.
For any integer n, all angles -150° n×360° will be coterminal with -150°. The appropriate choices are
-510° . . . . n=-1
210° . . . . n = 1
570° . . . . n = 2
Answer:
what are you saying
Step-by-step explanation:
this question is not correct