NCERT class 10 maths chapter 8 Introduction To Trigonometry
Question 1:In D ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine : (i) sin A, cos A (ii) sin C, cos C
Exercise 8.1 maths class 10 Chapter 8 Introduction To Trigonometry
Question 2:In Fig. 8.13, find tan P – cot R.
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Question 3:If sin A = 3 , 4 calculate cos A and tan A.
class 10 maths solutions Introduction To Trigonometry
Question 4:Given 15 cot A = 8, find sin A and sec A.
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Question 5:Given sec q = 13 , 12 calculate all other trigonometric ratios.
Introduction To Trigonometry class 10 ncert solutions
Question 6:If Ð A and Ð B are acute angles such that cos A = cos B, then show that Ð A = Ð B.
class 10 Maths NCERT Solutions Chapter 8 Introduction To Trigonometry Exercise 8.1
Question 7:If cot q = 7 , 8 evaluate : (i) (1 sin ) (1 sin ) , (1 cos ) (1 cos ) + q − q + q − q (ii) cot2 q
Exercise 8.1 class 10 Math ncert solutions Chapter 8
Question 8:If 3 cot A = 4, check whether 2 2 1 tan A 1 + tan A − = cos2 A – sin2A or not.
EXERCISE 8.11. In D ABC, right-angled at B, AB = 2
Question 9:In triangle ABC, right-angled at B, if tan A = 1 , 3 find the value of: (i) sin A cos C + cos A sin C (ii) cos A cos C – sin A sin C
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Question 10:In D PQR, right-angled at Q, PR + QR = 25 cm and PQ = 5 cm. Determine the values of sin P, cos P and tan P.
Question 11:State whether the following are true or false. Justify your answer. (i) The value of tan A is always less than 1. (ii) sec A = 12 5 for some value of angle A. (iii) cos A is the abbreviation used for the cosecant of angle A. (iv) cot A is the product of cot and A. (v) sin q = 4 3 for some angle q.