cohtrantmed.yolasite.comcohtrantmed.yolasite.com/resources/BtapHSLG4.pdf · a) 'Icos x .cos y sin (x - y) v J4sin2x .sin y -1- sin2(x - y) 2 (S/ X.Y) b) 3(tg x V tg 2X + lg 3X) 2
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