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" (iii) "6sin150^(@)cos120^(@)+cos330^(@...

" (iii) "6sin150^(@)cos120^(@)+cos330^(@)sin660^(@)+1=0

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sin120^(@)cos150^(@)-cos240^(@)sin330^(@)

sin120^(@)cos150^(@)-cos240^(@)sin330^(@)=

sin 120^(@) cos 150^(@)- cos 240^(@) sin 330^(@) =

sin 120^(@) cos 150^(@)- cos 240^(@) sin 330^(@) =

cos510^(@)cos330^(@)+sin390^(@)cos120^(@)

Find the value of sin330^(@)cos120^(@)+cos210^(@)sin300^(@)

Prove that: sin 150^@ cos 120^@+ cos 330^@ sin 660^@= - 1 .

Find the values of : (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

Find the values of: (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)