Question

which of the following are not trignometric identities? check all apply

Answer 1

sec2x+csc2x=1
tan2x+sec2x=1

Answer 2

Both are not

Answer 3

thought so thanks

Answer 4

\[\cos^2x+\sin^2x=1\]

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...