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A2 level trig question (OCR mei) Watch

1. The question is solve the equation cosec(2x)=2 for 0<x<360 (degrees). I have got as far as using the trig identity sin2x= 2sinxcosx:

cosec(2x)=1/(2sinxcosx)

2. (Original post by charlie.vagg)
The question is solve the equation cosec(2x)=2 for 0<x<360 (degrees). I have got as far as using the trig identity sin2x= 2sinxcosx:

cosec(2x)=1/(2sinxcosx)

You don't need the identity:

3. (Original post by charlie.vagg)
The question is solve the equation cosec(2x)=2 for 0<x<360 (degrees). I have got as far as using the trig identity sin2x= 2sinxcosx:

cosec(2x)=1/(2sinxcosx)

. So you just want to solve . Write and solve then then back-sub for .

Edit: ninja'ed.
4. Oh!! Thats so much simplier than i thought!! Thank you so much!!!

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Updated: May 22, 2016
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