1. Given sine of x equals negative 12 over 13 and cos x > 0, what is the exact solution of cos 2x? A. negative 119 over 169
B. negative 144 over 169
C. 119 over 169
D. 144 over 169

2.How many solutions exist for the equation cos 2θ − sin2θ = 1 on the interval [0, 360°)?
A. 0
B. 1
C.2
D. 3

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function