Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find cos(2?).
A. 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Simplify the radical expression. Indicate if the expression is not a real number.- 
A. Not a real number
B. - 
C. 
D. - 
Mathematics
Solve the problem.Without using a calculator, find the geometric mean of 4 and 9.
A. 36 B. 13 C. 6.5 D. 6 E. 5
Mathematics
Evaluate the series, if it converges.
A. Does not converge.
B. - 
C. 
D. 
Mathematics
Simplify the expression by performing the indicated operations.5
+ 
? 9
A. 30
+ 90
B. 15
+ 45
C. 15
+ 45
D. 25
+ 27
Mathematics