" (i) "sin120^(@)+tan150^(@)*cos135^(@)=(3+sqrt(2))/(2sqrt(3))

What is the value of (tan 9^(@) tan 23^(@) tan 60^(@) tan67^(@) tan 81^(@))/("cosec"^(2)72^(@)+cos^(2)15^(@)-tan^(2)18^(@)+cos^(2)75^(@))? (a) (1)/(2 sqrt(3)) (b) (sqrt(3))/(2) (c) (1)/(sqrt(3)) (d) 2 sqrt(3)

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

sin120^(@)=sin(180^(@)-60^(@))=sin60^(@)=(sqrt(3))/(2) cos150^(@)=cos(180^(@)-30^(@))=-cos30^(@)=(-sqrt(3))/(2) tan172^(@)=tan(180^(@)-8^(@))=-tan8^(@)=-0.1405

Find the values of : (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

Find the values of: (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

Find the values of : (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

Find the values of: (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

sin^(-1)((sqrt(3))/(2))-tan^(-1)(-sqrt(3))

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

tan^(2)120^(@)+cos^(2)150^(@)-sin^(2)300^(@)