Which of the following is an identity?
PLEASE HELP ASAP ;)

D. is the correct answer, cause your verifying the equation using trig rules..
Trigonometric Identities are equalities that utilize trigonometry functions and hold true for all variables in the equation. The correct option is D.
Trigonometric Identities are equalities that utilize trigonometry functions and hold true for all variables in the equation. There are several trigonometric identities relating to the side length and angle of a triangle.
Out of the four of the given options, if the fourth option is observed than then it can be solved as,
[tex]\sin^2x\cot^2x+\cos^2x\tan^2x=1\\\\\sin^2x\cdot\dfrac{\cos^2x}{\sin^2x}+\cos^2x\cdot\dfrac{\sin^2x}{\cos^2x}=1\\\\\cos^2x+\sin^2x = 1\\\\1=1[/tex]
Hence, the correct option is D.
Learn more about Trigonometric Identities:
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