Questions in trigonometry

Select	Question
	The angle subtended at the centre of a circle of radius 3 metres by an arc of length 1 metre is equal to
	A circular wire of radius $7\,cm$ is cut and bend again into an arc of a circle of radius $12cm$. The angle subtended by the arc at the centre is
	The radius of the circle whose arc of length $15cm$ makes an angle of 3/4 radian at the centre is
	If for real values of $x,\cos \theta =x+\frac{1}{x},$ then
	The incorrect statement is
	Which of the following relations is possible
	The equation ${{(a+b)}^{2}}=4ab{{\sin }^{2}}\theta $is possible only when
	The equation ${{\sec }^{2}}\theta =\frac{4xy}{{{(x+y)}^{2}}}$is only possible when
	Which of the following is correct
	Which of the following relations is correct

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