cos135^(@)

Find the value of cos(135^(@))

Prove that (i) " sin " 75^(@) =((sqrt(6)+sqrt(2)))/(4) (ii) (cos 135^(@) -cos 120^(@))/(cos 135^(@) +cos 120^(@)) =(3 -2sqrt(2)) (iii) " tan " 15^(@) +" cot " 15^(@) =4

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

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

Find the value of the following : (a) sin 120^(@) (b) cos 135^(@) (c ) tan 150^(@)

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

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