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(i) साबित करें कि sin 65^(@)+ cos 65^(@)...

(i) साबित करें कि `sin 65^(@)+ cos 65^(@) = sqrt(2) cos 20^(@)`
(ii) साबित करें कि ` sin47^(@)+cos 77^(@) = cos 17^(@)`

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sin47^(@)+cos77^(@)=cos17^(@)

sin65^(@)+cos65^(@)=sqrt(2)cos20^(@)

Prove that, sin65^(@)+cos65^(@)=sqrt(2)cos20^(@)

Prove that: sin65^(@)+cos65^(0)=sqrt(2)cos20^(@)

(a) Prove that sin65^(@)+cos65^(@)=sqrt(2)cos 20^(@) (b) Prove that sin47^(@)+cos77^(@)=cos17^(@)

(a) Prove that sin65^(@)+cos65^(@)=sqrt(2)cos 20^(@) (b) Prove that sin47^(@)+cos77^(@)=cos17^(@)

(a) Prove that sin65^(@)+cos65^(@)=sqrt(2)cos 20^(@) (b) Prove that sin47^(@)+cos77^(@)=cos17^(@)

Prove that: sin 65^0+cos 65^0=sqrt(2)cos 20^0

sin 85^(@)-sin 35^(@) - cos 65^@

(sin 65^(@) + sin 25^(@))/( cos 65^(@) + cos 25^(@))=