Answer :

We have to solve:

Recall the trigonometric identities,

sin^{2} θ + cos^{2} θ = 1

& sec^{2} α – tan^{2} α = 1

Put θ = 30° and α = 60°, we get

sin^{2} 30° + cos^{2} 30° = 1

& sec^{2} 60° - tan^{2} 60° = 1

So,

Thus,

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