Use the fundamental identities to find the value of the trigonometric function.Find cos ? if tan ? = 
and ? is in quadrant III.
A. 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Find 
for the given function.y = 
tan(7x - 3)
A. 
sec(7x - 3)
B. 
sec2(7x - 3) tan(7x - 3)
C. 
sec2(7x - 3) tan(7x - 3)
D. 
sec2(7x - 3)
Mathematics
Solve the problem.A reflecting telescope contains a parabolic mirror. If the mirror is 18 inches across at its opening and is 2 feet deep, where will the light be concentrated?
A. 0.1 in. from the vertex B. 0.8 in. from the vertex C. 10.1 in. from the vertex D. 0.2 in. from the vertex
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = x 
A. f-1(x) = x2 + 9
B. f-1(x) = x 
C. Not one-to-one
D. f-1(x) = x3 - 9
Mathematics
Answer the question.Choose the expression that is equivalent to the following: 5(
)
A. 
B. 
C. 5 + 
D. 5
Mathematics