(1+tan^2)(1-sin^2)=1

tan^2 = sin^2/cos^2

1 - sin^2 = cos^2

(1 + sin^2/cos^2)(cos^2) = cos^2 + sin^2 = 1

Thank you. Can you help me by checking my homework? I have a test coming up and want to make sure I'm understanding and doing this correctly before I take the test.

I'd like to but I'm kinda busy helping other students right now.

Ok thank you anyway :)

you bet :)

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