Find the values of of the following:
i) `cos 135^(@)`
ii) `sin(-780^(@))`
iii) `"cosec" 1920^(@)`

Find the values of the following: (i) sin75^(@) (ii) cos15^(@)

Find the values of: cosec 780^@

Find the values of the following: sin75^0 (ii) cos75^0 (iii) sin15^0 (iv) cos15^0

Find the values of the following: sin75^0 (ii) cos75^0 (iii) sin15^0 (iv) cos15^0

(a) Find the value of followings : (i) sin 150^(@) , (ii) cos 135^(@) , (iii) cos (-30^(@)) , (iv) tan 225^(@) . (b) If cos theta =(4)/(5) . Find the value of sin theta and tan theta . (c) Find the value of sin ^(-1)(1) .

Find the value of :- sin135^@

Find the value of :- cosec135^@

Find the value of (i) sin 150^@ (ii) cos 135^(@) (iii) tan^(120^(@)) .