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Elements of plane and spherical trigonometry . tan a . (1) sin2 d . tan 0 (2) sec a cos 0 cot (3) cot2 x +tan2 a; (4) sin y cos
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Does the graph of ƒ(x) = -1, x < 0 . 0, x = 0 . 1, x > 0 have a vertical tangent at the origin? - YouTube
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How do you find the equation of the tangent to the curve defined by y= (2e^x) / (1+e^x) at the point (0,1)? | Socratic
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