Sao Chuan's answer to Megan's Secondary 4 A Maths question.
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For differentiation questions, always work from outside to inside.
In this case, the most outer function is "ln f(x)" [where f(x)=cos x] which differentiates to 1/f(x). Then, apply the chain rule to cos x which differentiates to -sin x.
In this case, the most outer function is "ln f(x)" [where f(x)=cos x] which differentiates to 1/f(x). Then, apply the chain rule to cos x which differentiates to -sin x.
Date Posted:
7 years ago
how do you find the second part??
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