CAIE P1 2007 June — Question 3

Exam BoardCAIE
ModuleP1 (Pure Mathematics 1)
Year2007
SessionJune
TopicReciprocal Trig & Identities
3 Prove the identity \(\frac { 1 - \tan ^ { 2 } x } { 1 + \tan ^ { 2 } x } \equiv 1 - 2 \sin ^ { 2 } x\).
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