Where do I start with this:

cos^{-1}x + tan^{-1}x = π/2

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- Nov 14th 2012, 06:45 PMcdbowman42Inverse trigonometric equation
Where do I start with this:

cos^{-1}x + tan^{-1}x = π/2 - Nov 14th 2012, 06:50 PMMarkFLRe: Inverse trigonometric equation
I would take the cosine of both sides. The right side becomes zero, and on the left side you may apply the angle-sum identity for cosine.