Find the exact value of the expression. Do not use a calculator.csc2 85° - tan2 5°
A. 0
B. -1
C. 1
D. 2
Answer: C
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Find an equation for the line tangent to the curve at the point defined by the given value of t.x = t, y = 
, t = 18
A. y = 
x
B. y = - 
x
C. y = - 
x - 3
D. y = 
x + 3
Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
The length of the critical path of this project digraph is
A. 14 hours. B. 16 hours. C. 11 hours. D. 12 hours. E. none of these
Solve the problem.The graph of a trigonometric function f represented by f(t) = a sin (b(x - c)) is shown, where a, b, and c are nonnegative. State the amplitude.
A. -3.5 B. 7 C. 8? D. 3.5
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. (-1, 2, 1) B. (2, 1, 6) C. (2, -1, 4) D. No solution