Question

How can I find a?
(Trigonometric Ratios)

Answer 1

Explanation:

Hey there!

Use cos ratio to find the value of 'a'.

As per given, we can state that it is a Right angled triangle, so taking 38° reference angle.

We get;

p = AC

b = 6

and h= a

Here, Use the value of b, h and 38° angle to find the value of a.

`\cos(38° ) = (b)/(h)`

`\cos(38°) = (6)/(a)`

`0.7881 = (6)/(a)` [ cos(38°=0.7881]

`0.7881a = 6`

`a = (6)/(0.7881)`

Therefore the measure of a is 7.61 Or 8.

Hope it helps..