Use the given information to find the exact value of the trigonometric function.sec ? = 4, ? lies in quadrant I
Find cos 
.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use differentiation to determine whether the integral formula is correct.
dx = -4 cot 
+ C
A. No B. Yes
Mathematics
Solve the equation.
(r + 6) = 
(r + 8)
A. 1 B. 2 C. -2 D. -1
Mathematics
Determine whether the statement is true or false.-913 = (-9)13
A. False B. True
Mathematics
Use the power rule and the power of a product or quotient rule to simplify the expression.(-3xy)2
A. 9xy B. 9x2y2 C. -6xy D. -6x2y2
Mathematics