Question Simplify the expression −sin2(a)×b Evaluate cos(a)×bcos(a)−bMultiply the terms cos2(a)×b−bTransform the expression b(cos(a)−1)(cos(a)+1)Transform the expression b(−sin2(a))Simplify −bsin2(a)Solution −sin2(a)×b Show Solution Factor the expression b(cos(a)−1)(cos(a)+1) Evaluate cos(a)×bcos(a)−bMultiply the terms cos2(a)×b−bFactor out b from the expression (cos2(a)−1)bUse a2−b2=(a−b)(a+b) to factor the expression (cos(a)−1)(cos(a)+1)bSolution b(cos(a)−1)(cos(a)+1) Show Solution
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