NCERT solutions for CBSE class 10 maths Chapter 8 Trigonometry Ex 8.1
00:02 CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.1 q8. If 3 cot A = 4, check whether (1-tan²A)/(1+tan²A) = cos²A - sin²A or not.
00:48 Take LHS of trigonometric equation
00:20 The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
02:28 Take RHS of trigonometric equation
02:53 Apply Trigonometric Ratio
tangent of angle theta = side opposite to angle theta / side adjacent to angle theta.
03:31 Pythagoras Theorem
In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
04:01 cosine of angle theta = side adjacent to angle theta / hypotenuse
Remember as ' CAH ' Cosine equals Adjacent over Hypotenus.
04:20 consider Trigonometric Ratio
sine of angle theta = side opposite to angle theta / hypotenuse
sin is equal to opposite over hypotenuse.
Remember as ' SOH '
04:39 solve trigonometric equation
05:31 CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.1 q9. In triangle ABC, right-angled at B, if tan A = 1/ sqrt (3) : find the value of:
(i) sin A cos C + cos A sin C (ii) cos A cos C – sin A sin C
06:06 Naming the sides | Determining the sides of right angles triangles using Trigonometric Ratio Tan.
07:08 tangent of angle theta = side opposite to angle theta / side adjacent to angle theta.
Remeber as ' TAO '. Tan is adjacent over Opposite.Remember as ' TAO '
08:00 Pythagoras LAW
CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.4
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