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Problem 18 - Entrance Test

What is the value of (sec²θ - tan²θ) / (cosec²θ - cot²θ)?

Correct: B

We use two fundamental trigonometric identities: 1) sec²θ - tan²θ = 1 2) cosec²θ - cot²θ = 1 Substitute these values into the expression: 1 / 1 = 1.