Trig Substitution Flashcards
(3 cards)
1
Q
what sub. should be used for
√(a^2 - x^2)
A
x = asinθ
dx = acosθdθ
√(a^2 - x^2) = acosθ
2
Q
what sub. should be used for
√(a^2 + x^2)
A
x = atanθ
dx = asec²θdθ
√(a^2 + x^2) = asecθ
3
Q
what sub. should be used for
√(x^2 - a^2)
A
x = asecθ
dx = asecθtanθdθ
√(x^2 - a^2) = atanθ
