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On the same diagram, sketch the graphs of

y=sin 3x & y=cos2x,
for x between 0 degree and 180 degree
Hence state the number of soutions to the equation
sin 3x=cos 2x
in the interval 0 degree less than or equals to x which is less then or equals to 180 degree

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If p =( 1 + cosx )/sinx, 1/p= ( 1 - cosx )/( sinx ), find sinx and cosx in terms of p.

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