Express the sum or difference as a product of sines and/or cosines.sin (8?) - sin (4?)
A. 2 cos (4?) cos (6?)
B. 2 sin (2?) cos (6?)
C. 2 sin (6?) cos (2?)
D. 2 sin (2?)
Answer: B
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Answer the following statement true (T) or false (F)
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A. sec2 ? + 2 B. tan2 ? - 1 C. 3 sec2 ? - 2 D. 4 sec2 ?
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A. equal B. not equal
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