In a circular race of 1200 m length, A and B start with speeds of 18kmph and 27 kmph starting at the same time from the same point. When will they
meet for the rst time at the starting point when running in the same direction and opposite direction?
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Answer:
θ ≤ 90?
cos θ = 0 when θ = 90 ˚ , 270˚ . Maximum value of cos θ is 1 when θ = 0 ˚, 360˚. Minimum value of cos θ is –1 when θ = 180 ˚.Apr 3, 2011
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