Eric Nicholas K's answer to Sonia's Secondary 4 A Maths Singapore question.
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At the turning points, remember: the tangent to the curve at that point will always be horizontal, with a gradient of 0, so dy/dx = 0 at these points.
You have converted a differentiation question into a trigo question which you will need the trigo knowledge which you have learnt.
You have converted a differentiation question into a trigo question which you will need the trigo knowledge which you have learnt.
Date Posted:
4 years ago