Question

Q2
In A ABC, right angled
at B, AB = 24 cm, BC =
7 cm, cosA =
A) 25/24.
B) 24/23.
C) 24/25.
D) 23/24.
Choose_Answer​

Answer 1

Answer:

(i) Given: In △ABC, AB = 24 cm, BC = 7 cm and ∠ABC = 90° To find: sin A, cos A By using Pythagoras theorem in △ABC we have AC2 = AB2 + BC2 AC2 = 242 + 72 AC2 = 576 + 49 AC2 = 625 AC = √625 AC= 25 Hence, Hypotenuse = 25 By definition, sin A = PerpendicularsideoppositetoangleAHypotenusePerpendicularsideoppositetoangleAHypotenuse sin A = BCACBCAC sin A = 725725 And, cos A = BasesideadjacenttoangleAHypotenuseBasesideadjacenttoangleAHypotenuse cos A = ABACABAC cos A = 24252425 (ii) Given: In △ABC , AB = 24 cm and BC = 7 cm and ∠ABC = 90° To find: sin C, cos C By using Pythagoras theorem in △ABC we have AC2 = AB2 + BC2 AC2 = 242 + 72 AC2 = 576 + 49 AC2 = 625 AC = √625 AC= 25 Hence, Hypotenuse = 25 By definition, sin C =PerpendicularsideoppositetoangleCHypotenusePerpendicularsideoppositetoangleCHypotenuse sin C = ABACABAC sin C = 24252425 And, cos C = BasesideadjacenttoangleCHypotenuseBasesideadjacenttoangleCHypotenuse cos A = BCACBCAC cos A =725Read more on Sarthaks.com - https://www.sarthaks.com/636002/in-a-abc-right-angled-at-b-ab-24-cm-bc-7-cm-determine-i-sin-a-cos-a-ii-sin-c-cos-c

Answer 2

Answer:

b

Explanation:

I think it's B option hope it is helpful