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  4. ( sin α + cos ec α)2 + ( sec α + cos α)2= k + tan2 α + cot2 α : ⇒ k =

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Q. $(\sin \alpha + \cos ec \alpha)^2 + (\sec \alpha + \cos \alpha)^2= k + \tan^2 \, \alpha + \cot^2 \alpha \: \, \, \Rightarrow k = $

Trigonometric Functions

Solution:

Square and simplfy