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Engineering, 02.09.2021 14:00 DestroYa121
1 tan theta equal to 1 by 7 and tan beta is equal to 1 by 3 prove that cos 2 theta is equal to sign for beta
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1 tan theta equal to 1 by 7 and tan beta is equal to 1 by 3 prove that cos 2 theta is equal to sign...
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