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" 77."sin105^(@)+cos105^(@)=?...

" 77."sin105^(@)+cos105^(@)=?

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

105^(2)

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

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

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

Prove that : (i) "sin"105^(@)+cos105^(@)=(1)/(sqrt(2)) (ii) cos105^(@)+cos15^(@)="sin"75^(@)-"sin"15^(@)

Show that sin 105^(@) + cos 105^(@) =(1)/(sqrt(2))

sin 105^(@) + cos 105^(@) = cos theta, then theta =

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

sin15^@+cos105^@=