VBN2470
Well-Known Member
Re: HSC 2015 3U Marathon
and use the half-angle formula to make the differentiation easier to do. Should yield the same answer though ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Alternatively, you could try substituting
.
(using the chain rule)
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