Concepts covered in Chapter 8 include trigonometric ratios, trigonometric ratios of complementary angles, trigonometric identities. The values of the trigonometric ratios of an angle do not vary with the lengths of the sides of the traiangle, if the angle remains the same.
The trigonometric ratios of complementary angles are as follows:. An equation involving trigonometric ratios of an angle is said to be trigonometric idnetity , if it is true for all values of the angles involved. Some of the key trigonometric identities used in this chapter are as follows:.
Consider right triangle ABC, right angled at B. Determine the lengths of the other two sides. What are the values of A, B, and C?
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