In triangle ABC, angle C is 90 degrees. cosA = 3/10. find sinB
| September 22, 2021 | education
Consider a triangle with a leg 3 and a hypotenuse 10. Since the angle C is a straight line (a rectangular triangle), we find the second leg by the Pythagorean theorem:
√ (10 ^ 2 – 3 ^ 2) = √91.
Then, by determining the sine of the angle, we get:
sin (B) = √91 / 10.
Answer: the sought sine of angle B is √91 / 10.
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.
