Find the value of following angle

`angle COD`

Find the values of the following allied angles : (i) sin(-30^(@))

Find the values of the following allied angles : (vii) cos 135^(@)

Find the values of the following allied angles : (iii) tan 210^(@)

Find the values of the following allied angles : (iv) sin 300^(@)

Find the values of the following allied angles : (ii) cos 120^(@)

Find the values of the following allied angles : (vi) sin 225^(@)

Find the values of the following allied angles : (v) sin 330^(@)

If AB is parallel to CD as given in the figure, then find the values of angle x, angle y and angle z .

In a triangle ABC, angle A = 60^(@) and b : c = (sqrt3 + 1) : 2 , then find the value of (angle B - angle C)