Question: Which expression is equivalent to cos(A+B) cos(A-B) When plugging in cos a+b and cos a-b how to I simplify to get one of these answers

Which expression is equivalent to cos(A+B) cos(A-B)

When plugging in cos a+b and cos a-b how to I simplify to get one of these answers

answers are

Which expression is equivalent to cos(A+B) cos(A-B) When plugging in cos a+b

COs(A + B) Which expression is equivalent to COS(A - B) . V 1 + tan A tan B O 1 - tan A tan B 1 - tan A tan B O 1 + tan A tan B O cos A sin B sin A cos B

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