Q. 10

# A rotating ray makes an angle π. Let us write by calculating, in which direction the ray has completely rotate and there after what more angle it has produced.

Answer :

angle of the ray =

The negative sign shows that ray has rotated clockwise.

Adding multiples of 2π

∵ it is greater than , so it is in 2^{nd} quadrant.

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Let us write whether the following statements are true or false:

(i) The angle, formed by rotating a ray centering its end point in anticlockwise direction is positive.

(ii) The angle, formed for completely rotating a ray twice by centering its end point is 720°

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West Bengal Board - MathematicsA rotating ray makes an angle π. Let us write by calculating, in which direction the ray has completely rotate and there after what more angle it has produced.

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(iii) The circular value of the supplementary angle of the measure is_____

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