If sin-cosec-2-cos-2- k -tan 2- 2- then k -A- 7B- 9C- 5D- 3

The correct option is A 7L.H.S = sin^2 α + cosec^2 α + 2 + cos^2 α + ^2 α + 2 = 7 + ^2 α + tan^2 α , ∴ k = 7. ...

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Basic Trigonometric Identities

If sinα+cosec...

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If $(sin α + c o s e c α)^{2} + (cos α + sec α)^{2} = k + {tan}^{2} α + {cot}^{2} α$ then k =

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