# Integrating Trigonometric functions (part 3)

So part 3, we look at ! This is slightly more complicated as we need to first lay out some formulas that we should know.

(MF15)

(MF15)

Notice how and are quite related here… And we recall we have a trigonometry identity that happens to be that closely related:

!

Here we have a slight problem with

Recall the method we saw in part 1 and 2…

So,

As you probably guessed, and for , we can refer to the previous results.

We will look at in part 4, and surprise surprise, it will be quite a different appraoch! Let me know if there are any questions.

• […] formula 2. Integrating Trigonometric Functions (1) 3. Integrating Trigonometric Functions (2) 4. Integrating Trigonometric Functions (3) 5. Integrating Trigonometric Functions (4) 6. Integrating Trigonometric Functions (5) 7. Easiest […]

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