" ii) Tan "225^(@)

(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 following :- {:((a)sin 150^(@)"", (b)sin 135^(@)), ((c)cos 120^(@)"", (d)tan 225^(@)), ((e)cos 240^(@)"", (f)sin 210^(@)), ((g)sin 315^(@)"", (h)sin 300^(@)):}

Find the value of following :- {:((a)sin 150^(@)"", (b)sin 135^(@)), ((c)cos 120^(@)"", (d)tan 225^(@)), ((e)cos 240^(@)"", (f)sin 210^(@)), ((g)sin 315^(@)"", (h)sin 300^(@)):}

The value of tan 225^(@) is

Prove that tan 225^(@) cot 405^(@)+tan 765^(@) cot 675^(@)=0.

sin 225^@ =

Value of tan225^(@) is :

Prove that tan225^(@)cot405^(@)+tan765^(@)cot675^(@)=0

Prove that (sin150^(@)-5cos300^(@)+7tan 225^(@))/(tan 135^(@) + 3 sin 210^(@))=-2

(sin150^(@)-5cos300^(@)+7tan 225^(@))/(tan 135^(@)+3sin 210^(@))