Question 1100864
Use the given information to find the values of sin α/2 , cos α/2 , tan α/2 
sin &#945; = 8/17 ; &#960;/2 < &#945; < &#960;
Find cos(a)::
Since sin(a) = 8/17, y =  8, r = 17
So x = sqrt(17^2-8^2) = 25
And cos(a) = x/r = 25/17
--------------
a. sin &#945;/2 = sqrt[(1-cos(a))/2] = sqrt[(1-25/17)/2] 
b. cos &#945;/2 = sqrt[(1+cos(a)/2] = sqrt[(1+(25/17))/2] 
c. tan &#945;/2 = sqrt[(1-(25/17)/1+(25/17)]
--------------
Cheers,
Stan H.
--------------------