Use the information given about the angle ? to find the exact value of the indicated trigonometric function.cos ? = - 
, sin ? > 0Find cos 
.
A. - 
B. 
C. - 
D. 
Answer: B
Mathematics
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Use an appropriate identity to find the exact value of the expression.cos (-195°)
A. - 
B. 
C. 
D. 
Mathematics
Find the volume of the parallelepiped with adjacent edges PQ, PR, and PS.
 Figure 3.png)
Mathematics
Factor by grouping.2x3 - 6x2 + 7x - 21
A. (x + 3)(2x2 + 7) B. (x - 3)(2x2 - 7) C. (x - 3)(2x + 7) D. (x - 3)(2x2 + 7)
Mathematics
Decide whether the equation is conditional, an identity, or a contradiction. Give the solution set.4k + 31 = 2(2k + 12)
A. Conditional; {2} B. Contradiction; ? C. Identity; {all real numbers} D. Conditional; {-2}
Mathematics