Original post by jderrien
It can be shown that sin2x(tanx+cotx)=2
express
(1-cos2x)^2(tan1/2x+cot1/2x)^3
in terms of sinx
(2 marks)
Since this is two marks i feel as if it should be easy however i have no idea where to start.
express
(1-cos2x)^2(tan1/2x+cot1/2x)^3
in terms of sinx
(2 marks)
Since this is two marks i feel as if it should be easy however i have no idea where to start.
The tan(x/2)+cot(x/2) can be replaced from the first identity and you should know a double angle identity for the cos(2x) in terms of sin(x)
(edited 6 months ago)
Original post by mqb2766
The tan(x/2)+cot(x/2) can be replaced from the first identity and you should know a double angle identity for the cos(2x) in terms of sin(x)
still quite confused is there another way you can explain it. Thanks
Original post by jderrien
still quite confused is there another way you can explain it. Thanks
Using the first identity, how can you rewrite
tan(x/2)+cot(x/2)
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