The Student Room Group
Reply 1
What have you tried so far? :smile:
Reply 2
Well i have tryed

2cosθ= 1- sinθ
2=(1/cos&#952:wink: - tanθ

Wrong? or what now?
Thanks.
Reply 3
Square both sides, simplify using sin^2(x)+cos^2(x)=1 and go from there.

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