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Introduction: Trigonometry Video Lecture | Crash Course: Class 10

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FAQs on Introduction: Trigonometry Video Lecture - Crash Course: Class 10

1. What is Trigonometry and why is it important?
Ans. Trigonometry is a branch of mathematics that deals with the relationships between the angles and sides of triangles. It is important because it has various real-life applications, such as in navigation, engineering, architecture, physics, and even in everyday activities like measuring heights and distances.
2. How do I find the value of trigonometric ratios without a calculator?
Ans. Trigonometric ratios can be found without a calculator by using trigonometric tables or by using special triangles. Trigonometric tables provide the values of trigonometric ratios for specific angles. Special triangles, such as the 30-60-90 and 45-45-90 triangles, have predefined ratios that can be used to find the values of trigonometric ratios.
3. What are the basic trigonometric ratios?
Ans. The basic trigonometric ratios are sine, cosine, and tangent. Sine (sin) is the ratio of the length of the side opposite the angle to the hypotenuse. Cosine (cos) is the ratio of the length of the adjacent side to the hypotenuse. Tangent (tan) is the ratio of the length of the side opposite the angle to the length of the adjacent side.
4. How can I use trigonometry to solve real-life problems?
Ans. Trigonometry can be used to solve real-life problems by using the trigonometric ratios to find unknown angles or side lengths in triangles. For example, it can be used to calculate the height of a building, the distance between two points, or the angle of elevation or depression.
5. What is the difference between sine, cosine, and tangent?
Ans. The difference between sine, cosine, and tangent lies in the sides of the triangle they are associated with. Sine (sin) is the ratio of the side opposite the angle to the hypotenuse. Cosine (cos) is the ratio of the adjacent side to the hypotenuse. Tangent (tan) is the ratio of the side opposite the angle to the adjacent side.
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