Trigonometric identities Quiz Welcome to your Trigonometric identities Quiz Is this an identity? \[\frac{1-tan^{2}x}{1+tan^{2}x}=1-2sin^{2}x\] yes, it is no, it is not Is this an identity? \[\frac{sec^{2}x}{sec^{2}x-1}=csc^{2}x\] yes, it is no, it is not Is this an identity? \[\frac{1 + cosx}{sinx}=secx+cotx\] yes, it is no, it is not Is this an identity? \[\frac{secxsinx}{tanx + cotx}=sin^{2}x\] yes, it is no, it is not Is this an identity? \[\tan^{2}xsin^{2}x=tan^{2}x-sin^{2}x\] yes, it is no, it is not 1 out of 5 Time's upTime is Up!