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[" 5.Prove that: "],[[" (i) "sin65^(@)+c...

[" 5.Prove that: "],[[" (i) "sin65^(@)+cos65^(@)=sqrt(2)cos20^(@)]]

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

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

2sin65^@cos25^@=

cos 25^(@) - cos65^(@) =

(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 sin85^(@) - cos65^(@) +cos55^(@)=0

sin25^(@)cos65^(@)+cos25^(@)sin65^(@)

sin25^(@)cos65^(@)+cos25^(@)sin65^(@)