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If xcos(z) +ysin(z) =2a, xcos(k) + ysin(k) =2a and 2sin(z/2).sin(k/2) =1 then (a) cos(z) + cos(k) = 2ax/x 2 + y 2 (b) cos(z). cos(k) = (2a 2 - y 2 )/(x 2 + y 2) © y 2 =4a(z-x) (d) cos(z) +cos(k) = 2cos(z) cos(k) Here a is a constant.

If xcos(z) +ysin(z) =2a, xcos(k) + ysin(k) =2a and 2sin(z/2).sin(k/2) =1 then 
 
(a) cos(z) + cos(k) = 2ax/x2 + y2
(b)  cos(z). cos(k) = (2a2- y2)/(x2+ y2)
© y2 =4a(z-x)
(d) cos(z) +cos(k) = 2cos(z) cos(k)
Here a is a constant.

Grade:11

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