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show that cosx - cos^3 x over sinx is equal to sinxcosx


Explain why the polar distance of a great circle is exactly 90°?
The two sides of a spherical triangle are 37° and 75°, respectively. Explain why the third side should not exceed to 112°?
Find the arc length of the great circle on a sphere of radius 3000 miles subtended by a central angle of 7°. Express your answer in:
a. Degrees b. Nautical miles
What should be the third side and included angle of a spherical triangle if the two sides measure 90°each?
The two sides of a spherical triangle are 37° and 75°, respectively. Explain why the third side should not exceed to 112°?
What should be the third side and included angle of a spherical triangle if the two sides measure 90°each?
Explain why the polar distance of a great circle is exactly 90°? _______________________________________________________
a car travels 32km due north and then 46 km in a direction 40 degrees west of north. find the direction of the car's resultant vector
What should be the third side and included angle of a spherical triangle if the two sides measure 90°each?
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