Find all solutions of the equation.2 sin x + 1 = 0

A. x =  + 2n? or x =  + 2n?
B. x =  + 2n? or x =  + 2n?
C. x =  + n? or x =  + n?
D. x =  + n? or x =  + n?

Answer: A

Mathematics

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Find the length of the third side of the right triangle. Give an exact answer and, where appropriate, an approximation to three decimal places.

A. c =  cm; c ? 18.385 cm
B. c =  cm; c ? 8.124 cm
C. c = 338 cm
D. c =  cm; c = 169.0 cm

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Reduce the fraction.- 

A.  
B. -  
C. -  
D.

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Determine the domain and range of the function.{(1, -2), (4, -5), (-5, -3), (5, 1)}

A. Domain: {-2, -5, -3, 1}; range: {1, 4, -5, 5} B. Domain: {1, 4, 7, 5}; range: {-2, -5, -3, 7} C. Domain: {1, 4, -5, 5}; range: {-2, -5, -3, 1} D. Domain: {1, 0, -5, 5}; range: {-2, -5, 0, 1}

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Use identities to find the indicated value for each angle measure.cos ? = - ,   < ? < ?Find cos(2?).

A. - 
B.
C.
D. - 

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