In triangle ABC, the angle is C-straight, cosA = 0.6, BC = 12. Find AB?
September 29, 2021 | education
| Given:
ABC – right triangle;
Angle C = 90 degrees;
BC = 12;
cos A = 0.6;
Find AB.
Solution:
In order to find the hypotenuse AB of the triangle ABC, we use the formula:
cos A = AC / AB.
Substitute the known values into the formula and find the hypotenuse AB.
0.6 = AC / AB;
6/10 = AC / AB;
3/5 = AC / AB;
Hence, AB = 5.
Answer: AB = 5.
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