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(cos x - cos y)^2 + (sin x - sin y)^2 = 4sin^2 (x-y)/2
CBSE Class 11
cos-x-cos-y
Dhanalakshmi
July 15, 2019, 9:27am
#1
(cos x - cos y)^2 + (sin x - sin y)^2 = 4sin^2 (x-y)/2
Dhanalakshmi
July 15, 2019, 9:28am
#2