[" (ii) prove that (Prove that) "sin47^(...

[" (ii) prove that (Prove that) "sin47^(@)+cos77^(@)=cos17^(@)" ."],[" 2.आबित Do that (Prove that) "(cos10^(@)-sin10^(@))/(cos10^(@)+sin10^(@))=tan35^(@)],[" 3.साबित Do that (Prove that) "cos80^(@)+cos40^(@)-cos20^(@)=0.],[" ,सावित Do that (Prove that) "],[qquad sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)=sin70^(@)perp....0]

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Prove that :(cos10^(@)-sin10^(0))/(cos10^(@)+sin10^(0))=tan35^(@)

Prove that (cos10^(@)+sin10^(@))/(cos10^(@)-sin10^(@))=tan55^(@)

Prove that: (cos40^(@)+cos50^(@))/(sin40^(@)+sin50^(@))=1

Prove that: sin 47^0+cos 77^0=cos 17^0

prove that sin10^(0)+sin20^(0)+sin40^(@)+sin50^(0)=sin70^(0)+sin80^(@)

Prove that sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)=sin70^(@)+sin80^(@) .

Prove that : (cos 10^0 - sin 10^0)/(cos 10^0 + sin 10^0) = tan 35^0

Prove that sin10^(@) + sin20^(@) + sin 40^(@) + sin 50^(@) = sin 70^(@) + sin 80^(@)

Prove the following identities: (cos10^(@)-sin10^(@))/(cos10^(@) + sin10^(@))=tan 35^(@)