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10 cards from this deck
y = sin^-1(x) finds angle when sine is x.
Range is [-π/2, π/2].
d/dx[cos^-1(x)] = -1/√(1-x²).
Domain is all real x.
∫1/√(a²-x²) dx = sin^-1(x/a) + C.
d/dx[sin^-1(x)] = 1/√(1-x²).
∫1/(a²+x²) dx = (1/a)tan^-1(x/a) + C.
Range is [0, π].
Use tan^-1(opposite/adjacent) for elevation.
∫1/(x²-a²) dx = (1/2a)ln| (x-a)/(x+a) | + C.
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