find the value of expression tan(1/2 cos^-1 2/underoot5

Question

Vikas TU · Answer

Use the identity = > tan(theta/2) = (1- costheta)/sintheta Here, theta = cos^-1(2/underoot5) then tan(theta/2) = (1- cos( cos^-1(2/underoot5) ))/sin( cos^-1(2/underoot5)) = (1 – 2/root5)/(1/root5) = (root5 – 2)/1

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find the value of expression tan(1/2 cos^-1 2/underoot5

find the value of expression tan(1/2 cos^-1 2/underoot5

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