Question

If Sin A=3/5, then the value of cos A is ....​

Answer 1

Answer:

The value of Cos A will be 4/5.

Answer 2

Answer:

cos∅ = 4/5

Explanation:

Given:

sin A = 3/5

we know that,

sin∅ = opposite/hypotenuse

sin A = 3/5 = opposite /hypotenuse

opposite = 3

hypotenuse = 5

and cos∅ = adjacent/hypotenuse a

To find:

cos A = adjacent/hypotenuse. …(1)

we have,

Solution:

$ajacent = \sqrt{ {hypotenuse}^{2} - {opposite}^{2} } \\ = \sqrt{ {5}^{2} - {3}^{2} } \\ = \sqrt{25 - 9} \\ = \sqrt{16} \\ = 4$

From (1)

cos∅ = 4/5