Answer problem #3, showing ALL work accordingly. Thank you. Problem 3 Use the half-angle formulas to...

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* Si (2.5) sin . (4) = * ( 1 cas 45 2 ت t - 2 - -) X -1 لو له (۱۰۵ = C . ۱۰414 -) و21.4 0. 414 فعن ع 1464 .هل مع D. S8 (s sin

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