Question: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos? (33 ) - sin?(33 .) = cos(A ) then A =


Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos? (33 ) - sin?(33 .) = cos(A ) then A = degrees (b) If cos? (8x) - sin?(8x) = cos(B ) then B =
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