Questions by Rintze Zelle

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Questions by Rintze Zelle

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Suppose a railroad rail 2 kilometers in length expands 16 centimeters on a hot day. How many meters would the center rise above ground?

asked Jan 22, 2020

Mathematics
middle-school

1 answer

5 votes

76.9k views

Let t = cosA + sinA prove that t^2 = 1 + sin2A

asked Sep 16, 2019

Mathematics
middle-school

2 answers

3 votes

137k views

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