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Hi all

Teacher gave me homework that i am having trouble doing it ..

i need help in these two problems which i can't seem to solve.

how can i prove the following :

@= theta

cot@ + cos@

and

COS^2@ - cot@

my try is in the attach file

Teacher gave me homework that i am having trouble doing it ..

i need help in these two problems which i can't seem to solve.

how can i prove the following :

@= theta

__sec@ + tan@__= tan@sec@cot@ + cos@

and

__sin^2@ - tan@__= tan^2@COS^2@ - cot@

my try is in the attach file

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