- Two angles are said to be complimentary if they combine to make a right angle.
- In this case, we say that the two angles work well together.
How can one determine complementary angles?
Consider the case where one angle is x and the other is 90° - x. Thus, for trigonometric ratios when one ratio is complementary to another ratio by 90 degrees, such as; we employ these complementary angles.
- tan (90° – A) = cot A and cot (90° – A) = tan A
- sin (90° – A) = cos A and cos (90° – A) = sin A
- sec (90° – A) = cosec A and cosec (90° – A) = sec A
Two complementary angles differ by 12 degrees, find the angles.
Two complementary angles differ by 12 degrees, the angles are 390, and 510. Complementary angles are those whose combined angle is 90 degrees or less.