sqrt((1+cos30^(@))/(1-cos30^(@)))

Prove that sqrt((1+cos 390^(@))/(1-cos 30^@)) = tan 60^@ + sec 60^@

((tan60^(@)+1)/(tan60^(@)-1))^(2)=(1+cos30^(@))/(1-cos30^(@))

Prove that : ((tan60^(@)+1)/(tan60^(@)-1))^(2)=(1+cos30^(@))/(1-cos30^(@))

What is the value of (sin30^(@)+cos30^(@))/(cos30^(@)-sin30^(@)) ?

cos 15^(@) =............. A) sqrt((1+cos 30^(@))/(2)) B) sqrt((1-cos 30^(@))/(2)) C) pm sqrt((1+cos 30^(@))/(2)) D) pm sqrt((1- cos30^(@))/(2))

Show that : cos30^(@)=sqrt((1+cos60^(@))/(2))

Show that : cos30^(@)=sqrt((1+cos60^(@))/(2))

The set of positive values of n for which (sqrt((1+cos 30^(@))/(2))+ i sqrt((1-cos 30^(@))/(2)))^(n) is real, is

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

(cos30^(@)-sin20^(@))/(cos40^(@)+cos20^(@))=(4)/(sqrt(3))cos40^(@)cos80^(@)