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Basics: Trigonometry Video Lecture | Crash Course: Class 10
FAQs on Basics: Trigonometry Video Lecture - Crash Course: Class 10
| 1. What is trigonometry? |  |
Ans. Trigonometry is a branch of mathematics that deals with the relationships between the angles and sides of triangles. It helps in understanding and calculating various properties and measurements of triangles, such as the lengths of sides and the sizes of angles.
| 2. How is trigonometry useful in real life? | |
Ans. Trigonometry has various practical applications in everyday life. It is used in fields like engineering, architecture, physics, navigation, and even in measuring distances. For example, trigonometry can help calculate the height of a building, determine the angle at which a ramp should be built, or predict the trajectory of a projectile.
| 3. What are the three primary trigonometric functions? | |
Ans. The three primary trigonometric functions are sine (sin), cosine (cos), and tangent (tan). These functions are defined based on the ratios of the sides of a right triangle. Sin represents the ratio of the length of the side opposite an angle to the hypotenuse, cos represents the ratio of the adjacent side to the hypotenuse, and tan represents the ratio of the opposite side to the adjacent side.
| 4. How do you find the value of trigonometric functions? | |
Ans. The values of trigonometric functions can be found using either a scientific calculator or trigonometric tables. By entering the angle measure in degrees or radians, the calculator can provide the corresponding values of sine, cosine, and tangent. Trigonometric tables provide a pre-calculated set of values for common angles, allowing quick lookup of the function values.
| 5. Can trigonometry be used to solve non-right triangles? | |
Ans. Yes, trigonometry can be used to solve non-right triangles as well. This branch of trigonometry is known as spherical trigonometry and deals with triangles on curved surfaces, such as spheres. It involves using different formulas and concepts, such as the Law of Sines and the Law of Cosines, to calculate the angles and sides of these triangles.
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