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How do you find the related acute angle?

Answer 1

The related acute is an acute angle (#<90^@#) that can be found between the terminal arm and the x-axis when the terminal arm is in quadrants 2, 3, or 4. There is no related acute angle if the terminal arm lies in quadrant 1.

Here are some examples:

If the terminal arm is in quadrant 2, do #180^@# minus the principle angle to find the related acute angle.

If the terminal arm is in quadrant 3, do the principle angle minus #180^@# to find the related acute angle.

If the terminal arm is in quadrant 4, do #360^@# minus the principle angle to find the related acute angle.

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Answer 2

Allison Allen

To find the related acute angle, you can use the complementary angle theorem, which states that the sum of an angle and its complementary angle is always 90 degrees. So, subtract the given angle from 90 degrees to find the related acute angle.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.