Integral of expression with radical

Click For Summary
SUMMARY

The integral ∫u²√(a²-u²) du from 0 to a can be solved using trigonometric substitution. The suggested substitution is u = a sin(θ), which transforms the integral into a more manageable form. After applying this substitution, the integral simplifies to ∫a² sin²(θ) cos(θ) a dθ, allowing for straightforward integration. The final result can be computed by evaluating the definite integral after substituting back for u.

PREREQUISITES
  • Understanding of triple integrals and their simplification to single integrals
  • Knowledge of trigonometric identities and substitutions
  • Familiarity with integration techniques, particularly substitution methods
  • Basic calculus concepts, including definite integrals
NEXT STEPS
  • Learn about trigonometric substitution in integrals
  • Study integration techniques involving radical expressions
  • Explore the properties of definite integrals and their applications
  • Review examples of solving integrals with variable transformations
USEFUL FOR

Students studying calculus, particularly those tackling integral calculus problems involving trigonometric substitutions and radical expressions.

ghastlymeanlo
Messages
1
Reaction score
0

Homework Statement


There's a problem that involves triple integrals, but basically, I've boiled all of it down to the following single integral but cannot proceed any further.

∫u2 sqrt(a2-u2) du
from 0 to a

where a is a constant

Homework Equations


The Attempt at a Solution



I attempted to use a change of variables, where
v = a2 - u2 and
dv = -2udu

but i still can't integrate it after substituting in for all u's.
 
Physics news on Phys.org
How about a trig substitution?
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 22 ·
Replies
22
Views
3K
Replies
2
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 21 ·
Replies
21
Views
2K
  • · Replies 16 ·
Replies
16
Views
3K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K