The Student Room Group
Reply 1
cos ^2 x [ cos squared x]

1/2 (1+cos2x) = cos2x
etc...

sin ^2 x cos ^2 x [ sin squared x cos squared x]
= 1/2 sin22x
= 1/2 (1/2(cos4x - 1))
= 1/4 (cos4x - 1)
etc...

(cos2x-1)^2
= cos22x - 2cos2x + 1
= 1/2 (1+cos4x) - 2cos2x + 1
etc...
Reply 2
thx a lot dood!
Reply 3
good luck for your interview. what course are you applying for?
Reply 4
undry its an interview @ UCL for Maths with Eco

Latest