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" 5."sin105^(@)+cos105^(@)=cos45^(@)...

" 5."sin105^(@)+cos105^(@)=cos45^(@)

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sin15^(@)+cos105^(@)=?

Prove that: s in105^(@)+cos105^(0)=cos45^(@)

Prove that sin 105^(@) + cos 105^(@) = cos 45^(@)

cos15^(@)+cos105^(@)=

2sin45^(@)cos45^(@)

sin 15^(@) + cos 105 ^(@) =

sin75^(@)-sin15^(@)=cos105^(@)+cos15^(@)

Prove that sin105^@+cos105^@=cos45^@

sin15^@+cos105^@=