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This question is from electromagnetics subject

Points A(r = 100,6 = 90°, Ø = 0°)and B(r = 100,6 = 90°, Ø = 5°) are located on the
surface of a 100m radius sphere. (a) What is their separation using a path on the spherical
surface? (b) What is their separation using straight line path?

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