In triangle ABC, angle C is straight, sine A = 0.2, BC = 5. Find AB.
| August 12, 2021 | education
1) ▲ ABC, ∡ с – straight line.
bc = 5;
sin a = 0.2;
2) sin a = bc / ab;
bc – opposite leg.
ab is the hypotenuse.
3) Let us express ab.
ab * cos a = bc;
ab = bc / ab;
4) Find ab.
ab = 5 / 0.2;
ab = 5 / (2/10);
ab = 5 * 10/2;
Let’s reduce the numbers.
ab = 5 * 5;
ab = 25;
Answer: ab = 25.
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