In triangle ABC, angle C is a straight line, sinA = 0.2; BC = 5. Find AB.
| September 12, 2021 | education
In a right-angled triangle, the sine of the angle is equal to the ratio of the opposite leg to the hypotenuse. Consider a right-angled triangle ABC: AC and CB are legs, AB is hypotenuse.
Let us express the sine of angle A: sinA = BC / AB.
sinA = 0.2, BC = 5. Substitute the data and find the value AB.
0.2 = 5 / AB; 0.2 * AB = 5 * 1; AB = 5: 0.2 = 25.
Answer: AB = 25.
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