`sqrt[((1-cos^2 30)/(1-sin ^ 2 30))]` find the value

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

If cos 2x = cos 60^(@) cos 30^(@) + sin 60^(@) sin 30^(@), then the value of x is

cos 45^@=1/sqrt2 and sin 30^(@)=1/2 . Find the value of cos^(2)45^(@)+sin^(2)30^(@) .

(sin ^ (2) 30 ^ (@) - cos ^ (2) 30 ^ (@)) / (sin ^ (2) 30 ^ (@) + cos ^ (2) 30 ^ (@)) =

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

The is the value of (sin^2 30^@)/(cos^2 30^@)+(cos^2 30^@)/(sin^2 30^@) ?

Given that sin30^(@)=1//2 and cos 30^(@)=sqrt3//2 . Determine the values of sin 60^(@), sin 120^(@), sin 240^(@), sin 300^(@) , and sin (-30^(@)) .

If z_1=sqrt2 (cos 30^(@) +isin60^(@)),z_2=sqrt3 (cos 60^(@) +isin30^(@)) Find R_e(z_1z_2)