" 10."(cos60^(@)+1)/(cos60^(@)-1)" will be honoured :- "

(log)_(sin30^(@)cos60^(@))=1

cos^(-1) sin (-60^(@))

Value of sin60^@//cos60^@

(1-2[cos60^(@)-cos80^(@)])/(2sin10^(@)) = . .

(sec60)(cos60) =……………

"(1) "sin60^(@)cos30^(@)+sin30^(@)cos60^(@)

Value of the expression : (1+2sin60^(@)cos60^(@))/(sin60^(@)+cos60^(@))+(1-2sin60^(@)cos60^(@))/(sin60^(@)-cos60^(@)) is

Prove that cos thetacos(60^(@)- theta)cos(60^(@)+theta) = 1/4 cos 3 theta

Show that : (1-sin60^(@))/(cos60^(@))=2-sqrt3 .

Calculate : (tan60^(@)-tan30^(@))/(1+tan60^(@) tan30^(@))+cos60^(@) cos30^(@)+sin60^(@) sin 30^(@) .