Create New Account
Create New Account

Sign in to Innings2

or

New Account     Reset Password     

Introduction to Trigonometry

    Summary

Powered by Innings 2

Reset Progress

This will delete your progress and chat data for all chapters in this course, and cannot be undone!

Glossary

Select one of the keywords on the left…

10th class > Introduction to Trigonometry > Summary

Summary

In this chapter, you have studied the following points :

1.In a right triangle ABC, right-angled at B:

sin A = side opposite to angle Ahypotenuse ,

cos A = side adjacent to angle A hypotenuse ,

tan A = side opposite to angle Aside adjacent to angle A

2.cosec A =

sec A =

cot A =

tan A = .

3. If one of the trigonometric ratios of an acute angle is known, the remaining trigonometric ratios of the angle can be easily determined.

4. The values of trigonometric ratios for angles 0°, 30°, 45°, ° and °.

5. The value of sin A or cos A never exceeds 1, whereas the value of sec A or cosec A is always greater than or equal to .

6.sin2 A + cos2 A = 1 for 0°< A ≤ °

sec2 A –tan2 A = for 0°≤ A ≤ 90°,

cosec2A = 1 + cot2 A for 0°< A ≤ °.