In the triangle ABC, the angle C of the straight line AC = 9 cos the angle A = 0.3 find AB.
| July 3, 2021 | education
1) triangle ABC, ∡ с – straight line.
ac = 9;
cos a = 0.3;
2) cos a = ac / ab;
ac – adjacent leg.
ab is the hypotenuse.
3) Let us express ab.
ab * cos a = ac;
ab = ac / ab;
4) Find ab.
ab = 9 / 0.3;
Multiply the numerator and denominator by 10.
ab = 9 * 10 / (0.3 * 10);
ab = 90/3 = 30;
Answer: ab = 30.
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