Q. 1 E4.8( 10 Votes )

Evaluate the following.

E.

Answer :

We have to solve:



Recall the trigonometric identities,


sin2 θ + cos2 θ = 1


& sec2 α – tan2 α = 1


Put θ = 30° and α = 60°, we get


sin2 30° + cos2 30° = 1


& sec2 60° - tan2 60° = 1


So,



Thus,


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