Some of the Restrictions of Trigonometrical Ratios are:
● If A and B two acute angles and sin A = sin B, then we get A = B. If we cancel sign from both side to get the result, that is wrong.
For Example: If Sin θ = 60°, then θ = 60°. But we should not cancel sign from both sides to get the result.
● Cos 2θ ≠ 2 Cos θ
● Sin A/Sin B ≠ A/B
● Sin A ± Sin B ≠ Sin (A ≠ B)
● Cos θ does not imply cos × θ; in fact, it represents the ratio of perpendicular and hypotenuse with respect to the angle θ of a right-angled triangle.
These are the restrictions of trigonometrical ratios need to be followed in case of learning the trigonometric ratios.
● Trigonometric Functions
From Restrictions of Trigonometrical Ratios to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.
New! CommentsHave your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.