Question Simplify the expression cos(a)−sin(a) Evaluate 1+sin(a)cos(a)cos3(a)−sin3(a)Transform the expression 1+sin(a)cos(a)(cos(a)−sin(a))(cos2(a)+sin(a)cos(a)+sin2(a))Use sin2(t)+cos2(t)=1 to transform the expression 1+sin(a)cos(a)(cos(a)−sin(a))(1+sin(a)cos(a))Solution cos(a)−sin(a) Show Solution
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