Christmas MT's answer to Ahmad mirza's Secondary 3 A Maths Singapore question.
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Here are my answers for Q10! For part a, carefully apply the trigo identity indicated in red. For part b, use the angle properties of trigo functions (in red) to simplify the expression. Please help to clarify with your school teacher on the sinx = sqrt(-1/2) portion on whether it is acceptable to do what I did.
Date Posted:
5 years ago