152k views
4 votes
If sin a=4 by 5,determine cos a


2 Answers

5 votes

Sin = 4/5 = Perpendicular/hypotenuse

CosA = Base/hypotenuse

Base = √hyp. ^- prep.^

Base= 3/5

May it helps you

User RaviTezu
by
6.1k points
4 votes

Answer:

3/5

Explanation:


Sin A = (4)/(5)=(oppsite side)/(hypotenuse)

Adjacent side² = hypotenuse² - opposite side²

= 5² - 4²

= 25 - 16

= 9

Adjacent side = √9 = 3

Cos A =
(Adjacent side)/(hypotenuse) = (3)/(5)

User Glebka
by
6.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.