Use the given information to find the exact value of the trigonometric function.sec ? = 4; The terminal side of ? lies in Quadrant I.
Find cos 
.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use a half-angle formula to find the exact value of the expression.sin 165°
A. 
B. - 
C. - 
D. 
Mathematics
Perform the indicated division or state that the expression is undefined.
A. 9 B. -10 C. 10 D. -9
Mathematics
Evaluate the expression using the values given in the table.(g?f)(1)
A. 6 B. -8 C. 8 D. -4
Mathematics
Multiply, then simplify the product. Assume that all variables represent positive real numbers.(2 - 3
)2
A. 4 + 9
B. 22 - 12
C. 4 - 9
D. 22 + 12
Mathematics