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# Core 3 proof help Watch

1. Prove cosec^2(A) times cos^2(A)=cosec^2-1

This is what I've tried but I just can't seem to do it.

[Cot^2(A)+1]1/sec^2(A)

[1+cot^2(A)]/[1+tan^2(A)]
2. (Original post by littleangel9914)
Prove cosec^2(A) times cos^2(A)=cosec^2-1

This is what I've tried but I just can't seem to do it.

[Cot^2(A)+1]1/sec^2(A)

[1+cot^2(A)]/[1+tan^2(A)]
3. (Original post by littleangel9914)
Prove cosec^2(A) times cos^2(A)=cosec^2-1

This is what I've tried but I just can't seem to do it.

[Cot^2(A)+1]1/sec^2(A)

[1+cot^2(A)]/[1+tan^2(A)]
Write as and you should find things become easier.
4. (Original post by notnek)
Write as and you should find things become easier.
Thanks I can see it now

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