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Trig Substitution for x^2 - a^2
Worksheet
Grade Level
Calculus II
CAL2.31 Trig Substitution for x^2 - a^2
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For x > 7, complete the square in sqrt(x
2
- 8x + 7). Which substitution is correct?
A
x = 3 sec(theta)
B
x - 4 = 3 sec(theta)
C
x - 4 = 7 sec(theta)
D
x - 4 = 3 sin(theta)
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