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

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!

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers