In ABC, angle C is a right angle. AC=15 and BC=13. Find the measure of angle B. Round answer to nearest tenth.
I need to know what you're supposed to enter in a graphing calculator to get this.
A = arctan 13/15 = 40.9 degrees
There also can be used the law of sines...
c/Sin90=AC/sinB
sinB= AC/(sqrt(AC^2+BC^2)
and B= arc sin ( )
I am not certain what the purpose of your assignment is.
if a store had sales of $72,597 and handled 750 transactions, what was the average sale? round to the nearest penny
To find the measure of angle B, you can use the trigonometric function cosine (cos).
In a right triangle, cosine is defined as the ratio of the adjacent side length to the hypotenuse. In this case, angle B is adjacent to side BC (length 13) and the hypotenuse is AC (length 15).
So, you can use the formula: cos(B) = BC / AC
To find the measure of angle B, you need to take the inverse cosine (cos^-1) of this ratio.
In a graphing calculator, follow these steps:
1. Enter "13 / 15" to calculate the ratio BC / AC.
2. Press the inverse cosine button (often denoted as cos^-1 or acos).
3. The calculator will give you the measure of angle B in radians.
4. If you need the answer in degrees, multiply the result by 180 and divide by π (pi).
5. Finally, round the result to the nearest tenth to match the required format.
By following these steps, you can find the measure of angle B using a graphing calculator.