Question

some important questions of chapter trigonometry class 10th​

Answer 1

Step-by-step explanation:

example:-1,2,5,6,7,9,10,12,14,15

In exercise 11.1 :-2,4,5,7

In exercise 11.2:-3,4,6,7

in exercise 11.3:-1,2,4,5

in exercise 11.4:-1,4,7,8,9 ,10

question are important

main important question are 11.4 :- 7,8,9,10

Answer 2

Question. 1 : In ∆ ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine:

(i) sin A, cos A

(ii) sin C, cos C

Question 2: If Sin A = 3/4, Calculate cos A and tan A.

Question.3: If ∠A and ∠B are acute angles such that cos A = cos B, then show that ∠ A = ∠ B.

Question 4: If 3 cot A = 4, check whether (1-tan2A)/(1+tan2A) = cos2 A – sin2 A or not.

Question 5: 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.

Question 6: Evaluate 2tan2 45 + cos2 30 – sin2 60.

Question 7: If tan (A + B) =√3 and tan (A – B) =1/√3,0° < A + B ≤ 90°; A > B, find A and B.

Question 8: Show that :

(i) tan 48° tan 23° tan 42° tan 67° = 1

(ii) cos 38° cos 52° – sin 38° sin 52° = 0