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10 questions from this quiz
11−x2\frac{1}{\sqrt{1-x^2}}1−x21
11+x2\frac{1}{1+x^2}1+x21
Only by a negative sign
dydx=1dxdy\frac{dy}{dx} = \frac{1}{\frac{dx}{dy}}dxdy=dydx1
arctanx+c\arctan x + carctanx+c
x=asinux = a\sin ux=asinu
x=atanux = a\tan ux=atanu
31+9x2\frac{3}{1+9x^2}1+9x23
cos2y+sin2y=1\cos^2 y + \sin^2 y = 1cos2y+sin2y=1
When denominator is quadratic, not standard
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