Mark scheme - NLCS Maths Department

The derivative of tan x was usually familiar, but those candidates who started with sin 2x/cos 2x usually got lost in algebraic complexity. A surprising number lost marks through giving the derivative of tan 2x as sec2x, or omitting the ‘2’ in 2 sec22x. ... anti-logging an equation of the correct form . Allow if c = 0 clearly stated ... ................
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