Use a power-reducing identity to find the exact value of the expression.csc2 (-157.5°)
A. 
B. 4 + 2
C. 8 + 4
D. 4
Answer: B
Mathematics
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Find the length of the curve.The circle r = 4 cos ?
A. 4? B. 2? C. 8? D. 16?
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Provide an appropriate response.
Find tan A to the nearest ten-thousandth if a = 14.5, b = 7.8, and c = 16.5. 
A. 1.8590 B. 1.1379 C. 0.5379 D. 1.8591
Mathematics
Write a polar equation in r and ? of an ellipse with the focus at the origin, with the eccentricity 0.8 and vertex at  FIGURE 1.png)
 multiple choice.png)
Mathematics
Identify each pair of complementary angles.
A. ?ABS and ?TBC; ?SBD and ?DBT B. ?ABS and ?DBT; ?SBD and ?TBC C. ?ABS and ?SBD; ?DBT and ?TBC D. ?ABS and ?DBC; ?ABD and ?DBT
Mathematics