if secA=12/5 what is the value of A

secA = 12/5

then cosA = 5/12 = .41666...

use your calculator, make sure you either have it set in degrees or radians, depending on what you want.
let me know what you got.

To find the value of A when secA is equal to 12/5, we can use the inverse trigonometric function, arccosine (acos).

The reciprocal of secA is cosine (cos), so we have cosA = 5/12.
Using the inverse cosine function (acos), we can find the value of A.

1. Open a calculator or a mathematical software that supports trigonometric functions.
2. Enter the value 5/12 (or 0.41667) into the calculator.
3. Use the inverse cosine function (often denoted as acos or cos^(-1)).
This function is usually found under the "2nd" or "INV" key on a calculator or using the acos() function in most programming languages.
4. Press the inverse cosine function button (acos or cos^(-1)) and input 5/12.
This will calculate the angle in radians.
5. The result will be the value of A in radians.
If you want to find the value of A in degrees, convert the result from radians to degrees by multiplying by (180 / π).

For example:
If A = acos(5/12) ≈ 1.1736 radians, then A ≈ 67.38 degrees.

Therefore, the value of A is approximately 1.1736 radians or 67.38 degrees.