8.4

Question 1

When performing a trig sub, what should you do if you have a² - x²

Answer 1

sub x = a*sin(x)

Question 2

When performing a trig sub, what should you do if you have a² + x²

Answer 2

sub x = a*tan(x)

Question 3

When performing a trig sub, what should you do if you have x² - a²

Answer 3

sub x = a*sec(x)