sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2

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Arun · Answer

Dear Rahul (sinx+siny)= &ndash; 21/65 cosx+cosy= &ndash; 27/65 Dividing this we get tan(x + y/2)=21/27 cos (x+y/2)=27/sqrt (1170) Regards Arun (askIITians forum expert)

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sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2

sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2

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sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2

sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2

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