Mathegoras

Trigonometry › Trigonometric identities › Complementary angles

Cosine of arcsecant plus arccosecant

High school · ●●○○○ 20 pts

Evaluate cos⁡(sec⁡−1x+csc⁡−1x)\cos\left(\sec^{-1}x+\csc^{-1}x\right) for ∣x∣≥1|x|\geq 1. (The answer is a single number, the same for every such xx.)

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inverse trigonometric functions