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

((cos30^(@)+sin60^(@))/(1+cos60^(@)+sin30^(@)))=(sqrt(3))/(2)

sin60^(@).cos30^(@)+cos30^(@)*sin60^(@)

Prove that: (cos30^(@)+sin60^(0))/(1+cos60^(@)+sin30^(@))=(sqrt(3))/(2)

cos30^(@)sin60^(@)+cos60^(@)sin30^(@)= ……………………

co60^(@)sin30^(@)+cos30^(@)sin60^(@) =___.

If it right to say cos(60^(@)+30^(@))=cos60^(@)cos30^(@)-sin60^(@)sin30^(@)

Show that : (i) (1-sin60^(@))/(cos60^(@))=(tan60^(@)-1)/(tan60^(@)+1) (ii) (cos30^(@)+sin60^(@))/(1+sin30^(@)+cos60^(@))=cos30^(@)

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

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

Prove that : sin60^(@)cos30^(@)+cos60^(@).sin30^(@)=1