let sinx+sin y=a and cos x+cos y=b, show that tan x/2and tan y/2 are the roots of equation :
 
(a^2+b^2+2b )t^2-4at+(a^2+b^2-2b)=0

Asked by satishsingh881 | 22nd Sep, 2014, 11:12: PM

Expert Answer:

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Answered by Vimala Ramamurthy | 23rd Sep, 2014, 10:55: AM