Home
Class 11
MATHS
सिद्ध कीजिए: sin ( -420) ^(@) cos (390^...

सिद्ध कीजिए: ` sin ( -420) ^(@) cos (390^(@) ) cos ( -660^(@) ) sin ( 330)^(@) =-1`

Promotional Banner

Similar Questions

Explore conceptually related problems

sin 420^(@) * cos 390^(@)- cos(-330^(@))* sin(-300^(@))=

Prove that sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

Prove that: sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

Prove that: sin(-420^(@))cos390^(@)+cos(-660^(@))sin330^(@)=1

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

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

Prove that: sin420^(@)cos390^(@)+cos(-300^(@))sin(-330^(@))=1

Prove that: "sin"420^(@) cos390^(@)+cos(-660^(@))"sin"(-390^(@))=(1)/(2) .

Find the values: (iii) sin 420^(@) cos 390^(@) - cos(-300^@) sin (-330^@)

cos 690^(@) * sin 840^(@) + cos 420^(@) * sin 1050^(@)=