Which is not correct formula?

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KollegeApply · Accepted Answer

1 + sec2θ = tan2θ Explanation: (A) 1 + tan2θ = sec2θ: CorrectTgQPHd|[]. This is a fundamental Pythagorean identity. (B) 1 + sec2θ = tan2θ: IncorrectTgQPHd|[]. Rearranging the correct identity from (A) gives sec2θ – 1 = tan2θ. (C) cosec2θ – cot2θ = 1: CorrectTgQPHd|[]. This is derived from the standard identity 1 + cot2θ = cosec2θ. (D) sin2θ + cos2θ = 1: CorrectTgQPHd|[]. This is the primary Pythagorean trigonometric identity.

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