निम्न के मान ज्ञात कीजिए:
`(i) cos 60^(@)cos30^(@)-sin60^(@)sin30^(@)`
(ii) `cos60^(@)cos30^(@)+sin60^(@)sin30^(@)`

Evaluate : cos60^(@)cos30^(@)+ sin 60^(@)sin30^(@)

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

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

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^(@)

Evaluate : (i) sin60^(@)*cos30^(@)-cos60^(@)*sin30^(@) (ii) tan30^(@)*cosec60^(@)+tan60^(@)*sec30^(@) .

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

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

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

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

Find the value of cos60^(@) cos 30^(@)-sin 60^(@) sin 30^(@)