If cos x = a, where , and cos y = - a, then which of the following could be the value of y?
A. x + 2π
B. x + π
C.
D. - x + 2π
Answer:B
If cos x = a, where , and cos y = - a, then which of the following could be the value of y?
A. x + 2π B. x + π C. D. - x + 2π
Explanation: B