" (b) "tan240^(@)

Find the value of (a) cos 120^(@) (b) sin 240^(@) (c) tan (-60^(@)) (d) cot 300^(@) (e) tan 330^(@) (f) cos (-60)^(@) (g) sin (-150)^(@) (h) cos ( -120)^(@)

tan 240^@ =

Find the values: (ii) sin 135^(@) cos 210^(@) tan 240^(@) cot 300^@ "sec" 330^(@)

Assertion (A): tan40^(@) + tan 80^(@) - sqrt(3)tan 40^(@) tan80^(@)=-sqrt(3) Reason ( R): tan( A + B) =tan A + tan B + tan(A + B) tan A tan B

If b cos (theta+120^(@))=c cos (theta +240^(@)), then the value of (b+c)/(b-c) tan theta is-

( tan (-225 ^@)tan (570 ^@)sec (675 ^@))/( cot (135^@ ) tan ( 240 ^@2 ) coscec (-45^@ )) is

If b cos ( theta+120^(@))= c cos (theta + 240^(@)),"then show that",b-c=-(b+c)sqrt3 tan theta

If A+B=(pi)/(2)rArr Tan A Tan B=1 , rArr Tan(A-B)=(tan A-tan B)/(1+tan A tan B)=(tan A-tan B)/(2) , rArr tan A=tan B+2tan(A-B) , (tan40^(@)+2tan10^(@))*(tan70^(@)-Tan20^(@))=

Evaluate the following: i) tan135^(@) ii) sec150^(@) iii) cot240^(@) iv) "cosec"1950^(@) v) cos(-1125^(@)) vi) tan(-1470^(@)) vii) tan1710^(@) viii) cot(-1770^(@))