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junior college 1 chevron_right H1 Maths chevron_right Singapore

I’m not sure how to do the questions circled! This is about Differentiation.

#differentiation #derivative

Date Posted: 8 months ago
Views: 55

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Eric Nicholas K
Eric Nicholas K's answer
3843 answers (Tutor Details)
Chain rule applies as usual. We would be differentiating sin x otherwise, but instead, we are differentiating sin 4x, so we have to differentiate the chain '4x' as well. Similar argument applies for cos 0.5x.

Remember that differentiating sin x gives cos x and differentiating cos x gives -sin x.
8 months ago
Thank you so much! I get it now :)