Question

if value of cos A=1/4.find the value of sin A​

Answer 1

Answer:

Given value of Cos A is 1/4

Therefore

1- cos^A = sin^2 A

1 - 1/16 = sin^2 A

16-1/16 = sin^2 A

15/16 = sin ^2 A

root 15 / 4 = sin A

$\frac{ \sqrt{15} }{4}$

Answer 2

Answer:

here is your answer............

Explanation:

let ,

b = AB

h = BC

p = AC

• cos A = b/h = AB/BC = 1/4

By Pythagoras Theorem :-

• (AB)^2 + (AC)^2 = (BC)^2
• (1)^2 + (AC)^2 = (4)^2
• (AC)^2 = 16 - 1
• AC = √15

#) sin A = p/h = AC/BC = √15/4