Find the exact value of the sum.
-cos 105° - cos 15°
A) 
B) 
C) 
D) 
Correct Answer:
Verified
Q508: Find the exact value of the sum.
-cos
Q509: Rewrite the expression in the form A
Q510: Find the exact value of the sum.
-sin
Q511: Use a sum-to-product identity to rewrite the
Q512: Use a sum-to-product identity to rewrite the
Q514: Use a sum-to-product identity to rewrite the
Q515: Use a sum-to-product identity to rewrite the
Q516: Graph the function by first writing it
Q517: Rewrite the expression in the form A
Q518: Find the exact value of the sum.
-sin
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