Question

If cost=1/3 and x is in quadrant 2 answer the following questions
​

Answer 1

if cosx=1/3

then

x=cos^-1 (1/3)

x=70.53

now

sin (x/2)=sin (35.27)

=0.577

Again

tan (x/2)=tan (35.27)

=0.707

hope its help u!