Home
Class 11
MATHS
Prove that: sin(-420^(@))cos390^(@)+cos(...

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

Promotional Banner

Similar Questions

Explore conceptually related problems

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

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

Prove that sin(-420^0)cos(390^0)+cos(-660^0)(sin330^0)=-1

Prove that: sin(-420^0)(cos390^0)+cos(-660^0)(sin330^0)=-1.

Prove that: sin(-420^0)(cos390^0)+cos(-660^0)(s in330^0)=-1.

Prove that sin(-420^0)(c0s390^0)+cos(-660^0)(sin330^0)=-1

Prove that sin(-420^0)(c0s390^0)+cos(-660^0)(sin330^0)=-1

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

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

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