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OpenStudy (anonymous):
show that arctan1+arctan2+arctan3=π
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OpenStudy (anonymous):
since arctan1 = pi/4, all we need to do is prove that arctan2 + arctan3 = 3pi/4.
OpenStudy (anonymous):
Let y = arctan2 and z = arctan3. So consider this triangle: |dw:1331940963862:dw|
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