SarkariPYQ

SSC CGL 2023 PYQ — Question 25

SSC CGL Tier II - 3 March 2023 - Shift 1 • Quantitative Aptitude • Q25

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Select the INCORRECT formula from the following options

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. sec2 θ + cos 2 θ = 1 

As we know that

Trigonometry identity

sin2 θ + cos 2 θ= 1

cosec2 θ - cot2 θ= 1

sec 2 θ- tan 2 θ= 1

Hence, sec2 θ + cos 2 θ = 1 is the wrong formula.