Can you help me solve these pre calc proofs?

Jenna

New member
Do you think you could help me solve these proofs step by step so that I understand how to do solve them? Thank you for everyone that helps! :)

1) 1-cot^2x / 1+cot^2x = 1-2cos^2x
2) sinx/1+cosx + (1+cosx/sinx)= 2cscx
3) cscx/1+cscx = 1-sinx/cos^2x
 
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