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cos(sin0)cos(330)+sin(390)cos(20)...

cos(sin0)cos(330)+sin(390)cos(20)

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Simplify cos(390)sin(420)+sin(-330)cos(300)

Prove that: cos510^(0)cos330^(@)+s in390^(@)cos120^(@)=-1

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

Prove that cos510^@cos330^@+sin390^@cos120^@=-1

Prove that, cos510^(@)cos330^(@)+sin390^(@)cos120^(@)=-1 .

cos 510^@cos330^@+sin 390^@cos120^@ =

Show that cos510^@cos330^@-sin390^@cos120^@=-1/2

Prove that: cos510^0cos 330^0+sin 390^0cos 120^0=-1.

Find the value of sin330^(0)cos120^(0)+sin300^(0)*cos210^(@)

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