Question 700977
Given sin theta=12/37 and 90 degrees < (less than or equal to)theta and theta is < (less than or equal to 180 degrees, find the exact value of cos theta/2
------------
sin(t) = 12/37
90<= t <=180
----------------
{{{cos(t) = sqrt(1 - sin^2(t))}}}
cos(t) = 35/37 --> -35/37 in Q2
---------------
{{{cos^2(t/2) = (1 + cos(t))/2 = 1/37}}}
{{{cos(t) = sqrt(37)/37}}}