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4 arctan(1/3)+4 arctan(1/4)+4 arctan(2/9)=pihow do i prove it but without using this formula arctan(x)+arctan(y) = arctan(
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2. 536 views
In a survey of 150 students, 90 were taking algebra, and 30 taking biology.a. what is the least number of students who could
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2. 5,377 views
The weight of the base only of the Statue of Liberty. Been looking in a lot of websites but no success
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2. 341 views