[" Using the formula,"cos A=sqrt((1+cos2A)/(2))" .Ind the "],[" value of "tan60^(@)" ."]

Using the formula cos A =sqrt((1+cos2A)/(2)) , find the value of cos30^(@) , it is given that cos60^(@)=(1)/(2) .

Using the formula cos A =sqrt((1+cos2A)/(2)) , find the value of cos30^(@) , it is given that cos60^(@)=(1)/(2) .

Using the formula, sinA=sqrt((1-cos2A)/(2)) , find the value of sin30^(@) , it being given that cos60^(@)=(1)/(2) .

Using the formula tanA = (sin 2 A)/(1 + cos 2 A),"find the values of " tan75^(@) " and " cot 22^(@) 30

Using the formula, tan 2A = (2tanA)/(1-tan^2A) , find the value of tan 60^@ , it being given that tan 30^@ =1/sqrt3

Using the formula cos 2theta = 2 cos^(2)theta - 1 , find the value of cos 30^(@) , it is being given that cos 60^(@) = 1/2

Find the value of tan45^(@)+2cos60^(@)-sec60^(@) .

tan(A/2)=(sqrt((1-cos A)/(1+cos A)))