Pi radians are equal to 180 degrees: π rad = 180°. One radian is equal 57.295779513 degrees:

Trigonometry Convert from Radians to Degrees pi/4 π 4 π 4 To convert radians to degrees, multiply by 180 π 180 π, since a full circle is 360° 360 ° or 2π 2 π radians. ( π 4)⋅ 180° π ( π 4) ⋅

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Explanation: × 1xradian = 180 π xdegrees. ⇒ π 2 xradian = π 2 ⋅ 180 π xdegrees. × × × × × x = 90xdegrees.

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The number π is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulas across mathematics and physics. It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although See more

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The mathematical formula for determining the day of the week is (y + [y/4] + [c/4] – 2c + [26(m + 1)/10] + d) mod 7