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117. Direct proofs of the formulae for tan (θ2 − θ1) and tan (θ2 + θ1) by geometrical methods

Published online by Cambridge University Press:  03 November 2016

J W Hesselgreaves
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Type
Classroom Notes
Information
The Mathematical Gazette , Volume 48 , Issue 365 , October 1964 , pp. 314 - 315
Copyright
Copyright © Mathematical Association 1964

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