Use identities to simplify the expression. Do not use a calculator.2 cos275° - 1
A. - 
B. 
C. - 
D. 
Answer: A
Mathematics
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Solve the problem.Solve for a: 
A. a = 
B. a = 
C. a = 
D. a = 
Mathematics
Provide an appropriate response. Explain what is meant by the angle of inclination.
What will be an ideal response?
Mathematics
Provide an appropriate response.
Find the direction in degrees (to the nearest 0.1°) of the vector It (total current) in the given figure. 
A. 51.1° B. 52.1° C. 38.9° D. 37.9°
Mathematics
Evaluate the indicated trigonometric function of the acute angle ?.If ? is an acute angle of a right triangle and if sin ? = 
, then find the value of tan ?.
A. 
B. 
C. 
D. 2
Mathematics