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(a) the figure drawn alongside shows two straight lines AB and CD . if the equation of the line AB is `x-sqrt3y + 5=0` and the equation of the line CD is `x-y=2`. write down the inclination of lines AB and CD; also find the angle `theta` i.e angle CPB
(b) if `cosectheta . cos( theta + 54^@)=1`.find the value of `theta` so that ` theta and (theta + 54 ^(@)) ` are acute angles.

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The correct Answer is:
`10^(@)`
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