In the triangle BAC, the angle C is 90. tg B = √21 / 2. Find cos B
| September 28, 2021 | education
Given:
ABC – right triangle;
Angle C = 90 degrees;
tg b = √21 / 2;
Find cos b.
Solution:
tg b = sin b / cos b = √21 / 2;
Hence we obtain that sin b = √21 and cos b = √2.
Hence, cos b = √2.
Answer: cos b = √2.
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