# Maths

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The speed of a point A due to the rotation of the earth is twice that of a point B.If A is on latitude 22°N.calculate the latitude of B

• Maths -

Check the diagram. The radius of the latitude at angle θ is r*cosθ.

Since speed is proportional to the radius of rotation, if B is at angle θ,

r cos22° = 2r cosθ

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