Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = 4, 0 < ? < 
Find cos 
.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the given equation for x.y = 7 sin x
A. x = 7 sin-1 y
B. x = sin-1 
C. x = 
sin-1 y
D. x = sin-1 7y
Mathematics
Use a finite sum to estimate the average value of the function on the given interval by partitioning the interval and evaluating the function at the midpoints of the subintervals.f(x) = 8x sin ?x on [0, 4] divided into 4 subintervals
A. - 4 B. 0 C. - 2 D. -16
Mathematics
Solve and check. Begin by using the addition or multiplication principles of equality to isolate the squared term. -4x2 = -28
A. ±
B. 14
C. ±7
D. 8
Mathematics
Solve the problem.Let u = 
, v = 
. Find v - u.
A. 
B. 
C. 
D. 
Mathematics