What is the radian measure of an angle in a unit circle if its central arc length is equal to half the circumference of the circle?
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What is the logarithm of 1000 base 10, when expressed using the change of base property as the logarithm of 1000 base 2 divided by the logarithm of 10 base 2?
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What is the value of cosh(2) - sinh(2) divided by sinh(1) + cosh(1)?