pre-calc help !!!!!!!

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1) cscθsinθ-sin^2θ

2)sinθcscθ/tanθ

3)secθ/cotθ+tanθ

4)(1-cosθ)(1+cosθ)

  • pre-calc help !!!!!!! -

    Is there a question ?

  • pre-calc help !!!!!!! -

    how do you solve them

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