Question

if cosA =0.8,find the value of sin A​

Answer 1

hey, here's your answer.....

Answer 2

The value of sin A is 0.6.

Given:

• If $cos A = 0.8$

To find:

• Find the value of sinA.

Solution:

Identity to be used:

${sin}^{2} A = 1 - {cos}^{2} A$

Step 1:

Find the value of sin²A.

Put the value of cos A in the identity.

${sin}^{2} A = 1 - ( {0.8)}^{2}$

or

${sin}^{2} A = 1 - 0.64$

or

${sin}^{2} A = 0.36$

Step 2:

Find the value of sin A.

$sin \: A = \sqrt{0.36}$

or

$\bf \red{sin \: A = 0.6}$

Thus,

The value of sin A is 0.6.

#SPJ3

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