Question

evaluate tan2 thita-sec2 thita​

Answer 1

Answer:

-1 is the answer to ur question (Using identity)

Step-by-step explanation:

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Answer 2

we know that, 1+tan2θ=sec2θ

Now, 

tan2θ−sec2θ

=tan2θ−(1+tan2θ)

=−1

Therefore, Answer is −1

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