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In Exercise, verify the identity. sec2 x tan” x + sec? x = sec4 x
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Cihnen, 8edx.tamx + 8 +4° : (4mu-H = 7 1, Hg, - Весх. tan°xt е с?и ged”-x 1 +an-x+1) Весм, 3 см Becta a RoHS — -

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