The book Key to Mr Jb Locks Elementary Trigonometry was written by author Henry Carr Here you can read free online of Key to Mr Jb Locks Elementary Trigonometry book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Key to Mr Jb Locks Elementary Trigonometry a good or bad book?
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Sin(60° + ^)sin(60°-^) = 4 sin A (sin2 60° - sin2 ^) = 4 sin ^ (| - sin2 A) Examples XXXV. 24. = 3 sin ^ - 4 sin3 A =sin 3 A, [Art. 167. ] 12. (coiiA~t^niAr=('^\4^'^^!^X=('^^ ^ ^ ^ ' \amiA cosily V sin^^ . Cosj^ / _/ CQS^ y / 2co8A \ ~ \sin J^ . Cos J^y ~ \ sin^ / s^sin J^ . Cos J^y ~ \ sin^ / cot i4 - 2 cot 2A = - sin2^ cos A 2 cos 2A ' sin A sin 2^ _2 cos2^4 2(co82^-sin2^) 2sin A cos ^ 2 sin ^ . Cos A 94 MULTIPLE ANGLES. XLII ~ sin A cos A ~ cos A ' /. (coti^-tani^)2(cot^-2cot^) = — 7-— J- . ...- -= 4-^— =4 cot ^. ^ ^ ^ / V gin^ ^ cos A sin ^ 13. Cos 3a - sin ^ . Sin 5a - cos 7a = cos 3a - cos 7a - sin /3 . Sin 5a = 2 sin 5a . Sin 2a - sin j8 sin 5a = sin 5a (2 sin 2a - sin p), sin 3a + sin ^ . Cos 5a - sin 7a = sin 3a - sin 7a + sin /3 . Cos 5a = - 2 cos 5a sin 2a + sin j3 cos 5a = - cos 5a (2 sin 2a - sin j3), cos 3a - sin /3 . Sin 5a - cos 7a sin 3a - sin j3 . Cos 5a - sin 7a sin 5a (2 sin 2a - sin j8) ^ ^, . , j i. I- « = g )c, -~. ^ r— ^; = - tan 5a a value independent of p, cos 6a (2 sm 2a - sm /3) 14.
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