" (ii) "(cos30^(@)+sin60^(@))/(1+sin30^(@)+cos60^(@))=cos30^(@)

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

cos 60^(@) sin 30^(@) +cos 30^(@) sin 60^(@)=

Show that (i) cos60^(@)*cos30^(@)-sin60^(@)*sin30^(@)=cos90^(@) (ii) cos60^(@)=1-2sin^(2)30^(@)=2cos^(2)30^(@)-1 (iii) (tan60^(@)-tan30^(@))/(1+tan60^(@)*tan30^(@))=tan30^(@)

Verify each of the following : (i) sin60^(@)cos30^(@)-cos60^(@)sin30^(@)=sin30^(@) (ii) cos60^(@)cos30^(@)+sin60^(@)sin30^(@)=cos30^(@) (iii) 2sin 30^(@)cos30^(@)=sin60^(@) (iv) 2sin45^(@)cos45^(@)=sin90^(@)

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

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

(cos 60^(@) xx cos 30^(@)+sin 60^(@)xx sin 30^(@))/(2 sin 30^(@) xx cos 0^(@)+ sin 90^(@))=?

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

(tan60^@)/(sin60^@+cos30^@)

sin 30^@ + cos 60^@ =………