## anonymous 4 years ago which of the following are not trignometric identities? check all apply

1. anonymous

sec2x+csc2x=1 tan2x+sec2x=1

2. anonymous

Both are not

3. anonymous

thought so thanks

4. precal

$\cos^2x+\sin^2x=1$ divide $\cos^2x$ to all three terms you get $1+\tan^2x=\sec^2x$ divide $\sin^2x$ to all three terms you get $\cot^2x+1=\csc^2x$ That is how I remember them...