sinx +siny =-21/65 and cosx +cosy =-27/65 then cos(x+y/2
Rahul Phatangare , 7 Years ago
Grade 11
Trigonometry> sinx +siny =-21/65 and cosx +cosy =-27/65...
1 Answers
Arun
Last Activity: 7 Years ago
Dear Rahul
(sinx+siny)= β 21/65
cosx+cosy= β 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)= β 21/65
cosx+cosy= β 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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