Grade 11Trigonometry
sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2
1 Answer
Arun
Dear Rahul
(sinx+siny)= – 21/65
cosx+cosy= – 27/65
Dividing this we get
tan(x + y/2)=21/27
cos (x+y/2)=27/sqrt (1170)
Regards
Arun (askIITians forum expert)
(sinx+siny)= – 21/65
cosx+cosy= – 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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