From the top of a hill h metres high the angles of depressions of the top and the bottom of a pillar are and respectively.The height (in metres) of the pillar is
256.
The period of is
257.
is equal to
258.
equals
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259.
If 3cos(x) sin x, then the general solution of sin2(x) - cos(2x) = 2 - sin(2x) is