Please it would be grateful if any body could solve the following questions -Prove that sin(180/14) sin(3*180/14) sin(5*180/14) sin(7*180/14) =1/8 .\tIf sin x + sin y = 3(cos y – cosx) , Prove thatsin 3x + sin 3y=0 .\tProve that tan2180/16 + tan22*180/16 + tan23*180/16 +..........+ tan27*180/16= 35 .

chetna bansal , 9 Years ago

Grade 11