Use the given triangles to evaluate the expression. Rationalize all denominators. 
sin 
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.The unit vectors u and v are combined to produce two new vectors 
and 
Show that a and b are orthogonal. Assume 
What will be an ideal response?
Find the indicated term of the arithmetic sequence.
, 1, 
, . . . ; a16
A. 
B. 7
C. 
D. 8
Use the quadratic formula to solve the equation. Give both exact and approximate answers.5x2 + 12x = -2
A. 
; 0.156, -2.556
B. 
; -0.18, -2.22
C. 
; -0.09, -1.11
D. 
; -1.38, -3.42
Graph the pair of parametric equations by hand, using values of t in [-2,2]. Make a table of t-, x-, and y-values, using t = -2, -1, 0, 1, and 2. Then plot the points and join them with a line or smooth curve for all values of t in [-2,2]. Do not use a calculator.x = t + 1, y = t2 + 2
What will be an ideal response?