Find the exact value using a double-angle identity.sin(300°)
A. - 
B. 
C. 0
D. - 
Answer: D
Mathematics
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Find an equivalent fraction with the given denominator.1 = 
A. 
B. 
C. 
D. 
Mathematics
Solve.12x + 4x2 = 0
A. -4, -3 B. -6 C. 0, -3 D. -3
Mathematics
Simplify the expression.  figure 1.png)
 figure 2.png)
Mathematics
Find the exact value of the indicated trigonometric function of ?, if ? is an angle in standard position whose terminal side contains the given point.(9, 12); Find cos ?.
A. 
B. 
C. 
D. 
Mathematics