Use the appropriate sum or difference identity to write the given expression as a function of x alone.sin (180° + x)
A. cos x
B. - cos x
C. - sin x
D. sin x
Answer: C
Mathematics
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State the quadrant in which the point is located.(20, -6)
A. I B. II C. III D. IV
Mathematics
Solve the logarithmic equation.log 3x = log 4 + log (x - 1)
A. - 
B. 
C. -4
D. 4
Mathematics
Perform the indicated operations and express your answer in the form a + bi. 
A. ±3
B. 3i
C. -i
D. -3i
Mathematics
Find the exact solutions to the quadratic equation, using a method of your choice.
x2 - x + 
= 0
A. 
, 
B. 
C. 
D. 
Mathematics