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[✓] Calculate a definite integral?

GROUPS:

Why the output of a definite integral is in between braces keyWhat is the meaning of this?, it suppose to show an algebraic expression in function of the integers limits What is the meaning of this?, it suppose to show an algebraic expression in function of the integers limits

POSTED BY: Oscar Moreno
Answer
3 months ago

Works fine :)

Integrate[7/4 r^3 Cos[17/100 + (4 p)/39]^2 Cos[p/4] Cos[1/10 (33/20 + p)]^2, {r, a, b}, {p, 0, 2 Pi}, {t, 0, 2 Pi}]

(* 2730 (-(a^4/4) + b^4/4) \[Pi] (1/780 + (5 (-1 + Sqrt[5]) Cos[33/100])/
   5616 + (195 Cos[1/100] Cos[(2 \[Pi])/195])/304072 + (
   195 Cos[67/100] Cos[(37 \[Pi])/195])/494648 + Sin[1/100]/76018 + 
   1/351 Sin[33/100] - (5 Sqrt[1/2 (5 + Sqrt[5])] Sin[33/100])/
   2808 + (8 Sin[17/50])/2485 - (39 Cos[(7 \[Pi])/78] Sin[17/50])/
   9940 - (79 Sin[67/100])/123662 - (
   195 Sin[1/100] Sin[(2 \[Pi])/195])/304072 + (
   39 Cos[17/50] Sin[(7 \[Pi])/78])/9940 + (
   195 Sin[67/100] Sin[(37 \[Pi])/195])/494648) *)

Clear the Kernel and then caluculate integral:

 ClearAll["Global`*"]; Remove["Global`*"]
POSTED BY: Mariusz Iwaniuk
Answer
3 months ago

It was the kernel, thank you!

POSTED BY: Oscar Moreno
Answer
3 months ago

Please post code rather than an image (it is not possible to cut and paste an image).

POSTED BY: Daniel Lichtblau
Answer
3 months ago

I´m sorry i´m new on this.

POSTED BY: Oscar Moreno
Answer
3 months ago

Group Abstract Group Abstract