right-triangle-trigonometry-solving-problems-on-trigonometric-ratios-using-soh-cah-toa

# Interactive video lesson plan for: Right Triangle Trigonometry | Solving Problems on Trigonometric Ratios using SOH CAH TOA

#### Activity overview:

Right Triangle Trigonometry | Solving Problems on Trigonometric Ratios using SOH CAH TOA

http://www.learncbse.in/ncert-class-10-math-solutions/
http://www.learncbse.in/ncert-solutions-for-class-10-maths-chapter-8-introduction-to-trigonometry/
http://www.learncbse.in/rd-sharma-class-10-solutions-chapter-5-trigonometric-ratios/

In this tutorial we show you how to name the sides of a right-angled triangle in preparation for using trigonometry to find lengths and angles in right-angled triangles

00:04 1. In triangle ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine
(i) sin A, cos A 003:00 (ii) sin C, cos C
00:25 Naming the sides | Finding sides of right triangle.
00:45 Pythagoras Theorem
01:40 Trigonometric Ratio Defination
sine of angle theta = side opposite to angle theta / hypotenuse
sin is equal to opposite over hypotenuse.
Remember as ' SOH '
02:15 cosine of angle theta = side adjacent to angle theta / hypotenuse
Remember as ' CAH ' Cosine equals Adjacent over Hypotenus.
04:00 3. If sin A = 3/4 calculate cos A and tan A.
04:27 Finding the sides of right-angled triangle
05:01 sin is equal to opposite over hypotenuse. Remember as ' SOH '
06:38 cosine of angle theta = side adjacent to angle theta / hypotenuse
Remember as ' CAH ' Cosine equals Adjacent over Hypotenus.
07:04 Tangent of angle theta = side opposite to angle theta / side adjacent to angle theta.Remeber as ' TAO '. Tan is adjacent over
07:25 4. Given 15 cot A = 8, find sin A and sec A.
07:53 Naming the sides
08:20 cotangent of angle theta = side adjacent to angle theta / side opposite to angle theta
09:05 Pythagoras Theorem
09:46 Trigonometric Ratio Defination
sine of angle theta = side opposite to angle theta / hypotenuse
sin is equal to opposite over hypotenuse. Remember as ' SOH '
10:20 Trigonometric Ratio Defination 'secant'
secant of angle theta = hypotenuse / side adjacent to angle theta
10:58 5. Given sec theta = 13/12 calculate all other trigonometric ratios.
11:24 Finding sides of sides of right triangle
11:34 naming the sides
11:40 Use Trigonometric Ratio
secant of angle theta = hypotenuse / side adjacent to angle theta
12:12 The values of the trigonometric ratios of an angle do not vary with the lengths of the sides of the triangle, if the angle remains the same.
12:30 Pythagoras Theorem
In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
12:30 Defination of Trigonometric Ratio
sine of angle theta = side opposite to angle theta / hypotenuse
sin is equal to opposite over hypotenuse.
Remember as ' SOH '
13:53 cosine of angle theta = side adjacent to angle theta / hypotenuse
Remember as ' CAH ' Cosine equals Adjacent over Hypotenus.
14:16 Tangent of angle theta = side opposite to angle theta / side adjacent to angle theta.
Remeber as ' TAO '. Tan is adjacent over
14:53 RECIPRACAL IDENTITY
15:36 10. In triangle PQR, right- angled at Q, PR + QR = 25 cm and PQ = 5 cm. Determine the values of sin P, cos P and tan P.
16:28 Finding sides of sides of right triangle
20:04 sin is equal to opposite over hypotenuse.
Remember as ' SOH '
20:34 cosine of angle theta = side adjacent to angle theta / hypotenuse
Remember as ' CAH ' Cosine equals Adjacent over Hypotenus.
21:20 Tangent of angle theta = side opposite to angle theta / side adjacent to angle theta.
21:31 11. State whether the following are true or false. Justify your answer.
21:43 (i) The value of tan A is always less than 1.
21:45 False ,Explanation.
22:21 (ii) sec A = 12/5 for some value of angle A.
22:30 True
23:08 (iii) cos A is the abbreviation used for the cosecant of angle A.
23:20 False
23:35 cosine of angle is abbreviated as Cos A.
23:45 (iv) cot A is the product of cot and A.
23:50 cot A is cotangent of angle A
23:59 (v) sin theta = 4/3 for some angle theta
24:05 Important property of sine.+

trigonometric ratios lesson
Trigonometric Ratios Defination
Trigonometric Ratios - SohCahToa

learncbse.in
CBSE solutions for class 10 maths Chapter 6 Triangles Exercise 8.4
CBSE class 10 maths NCERT Solutions chapter 8 Trigonometry Exercise 8.4| trigonometric identities
CBSE class 10 maths NCERT Solutions chapter 8 Trigonometry
Solutions for CBSE class 10 Maths chapter 8 Trigonometry
NCERT solutions for class 10 maths Triangles
NCERT solutions for CBSE class 10 maths chapter 8 Trigonometry
CBSE class 10 maths solutions chapter 8 Trigonometry

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