In a right-angled triangle abc (angle C = 90 °) AB = 15cm, sinA = 0.6. Find leg BC.

We know that our triangle is rectangular, which means that the sine of angle A is equal to the opposite leg, which must be divided by the hypotenuse.
Let’s write down the formulas:
sin A = BC / AB;
Substitute the values:
0.6 = BC / 15;
BC = 15 * 0.6;
BC = 9;
Answer: BC = 9.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.