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इन को सिद्ध कीजिएः cos((3pi)/(4)+x)-co...

इन को सिद्ध कीजिएः
`cos((3pi)/(4)+x)-cos((3pi)/(4)-x)=` `-sqrt2cosx`

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cos((3pi)/(4)+x)-cos((3pi)/(4)-x) = -sqrt(2)sinx

cos((3pi)/(4)+x)-cos((3pi)/(4)-x) = -sqrt(2)sinx

cos((3pi)/(4)+x)-cos ((3pi)/(4)-x)=-sqrt(2) sin x

cos ((3pi)/( 4) + x) - cos((3pi)/( 4) -x) =- sqrt2 sin x

cos ((3pi)/( 4) + x) - cos((3pi)/( 4) -x) =- sqrt2 sin x

cos ((3pi)/( 4) + x) - cos((3pi)/( 4) -x) =- sqrt2 sin x

Prove that cos((pi)/(4)+x)+cos((pi)/(4)-x)=sqrt(2)cosx

Prove that cos((3pi)/(4)+x)-cos((3pi)/(4)-x)=-sqrt(2)sinx

Prove that cos((3pi)/4+x)-cos((3pi)/4-x)= -sqrt2 sinx

Prove that: cos((pi)/(4)+x)+cos((pi)/(4)-x)=sqrt(2)cos x