Answer:
Step-by-step explanation:
Step-by-step explanation:
½ [cos(a − b) − cos(a + b)]
Using sum and difference formulas:
½ [cos a cos b + sin a sin b − (cos a cos b − sin a sin b)]
Distribute the negative:
½ (cos a cos b + sin a sin b − cos a cos b + sin a sin b)
Combine like terms:
½ (2 sin a sin b)
Simplify:
sin a sin b
Answer:
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Step-by-step explanation:
It will be easier if u watch them
Answer:
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Step-by-step explanation:
Answer:
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Step-by-step explanation:
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