Find the value of following angle

`angle BOC`

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 : (vi) sin 225^(@)

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 : (iii) tan 210^(@)

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 the following, PQRS is a rhombus, SQ and PR are the diagonals of the rhombus intersecting at O. If angle OPQ = 35^(@) , then find the value of angle ORS + angle OQP.

Find the value of the unknown interior angle x in the following figures: