hemantagorkha55 hemantagorkha55

18-08-2020
Mathematics

contestada

if sina=4/5 find the cosa

Respuesta :

mathstudent55 mathstudent55

18-08-2020

Answer:

cos A = 3/5

Step-by-step explanation:

sin A = 4/5

sin^2 A + cos^2 A = 1

(4/5)^2 + cos^2 A = 1

16/25 + cos^2 A = 1

cos^2 A = 9/25

cos A = 3/5

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