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Maths CCEA C3 - Trigonometry Identity watch

1. how to prove = Sec(theta) - Cos(theta) = Tan(theta)Sin(theta)
2. 1/cosΘ - cosΘ/1

{1 - cosΘcosΘ}/cosΘ

{1 - cos2Θ}/cosΘ

the top line should look familiar...
3. (Original post by the bear)
1/cosΘ - cosΘ/1

{1 - cosΘcosΘ}/cosΘ

{1 - cos2Θ}/cosΘ

the top line should look familiar...
yeah but how does that form tan(theta)sin(theta)
4. (Original post by apaul322)
yeah but how does that form tan(theta)sin(theta)
i am not allowed to give you the complete solution... just helpful hints.
5. (Original post by apaul322)
yeah but how does that form tan(theta)sin(theta)
core 2 identities may help here (consider what you can do with cos^2(x) )

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