<h3>Answer;</h3>
C. The alternative form of the law of cosines
When given all three side lengths of a triangle but none of the angle measures, you can solve for all angle measures using<u> the alternative form of the law of cosines</u>.
<h3>Explanation;</h3>
- From the law of cosines, given that a, b and c are the edges of a triangle and A, B and C are the corresponding interior angles of the the triangle.
<h3>Then; a² = b² + c² − 2 bc cos A, or</h3><h3> b² = a² + c² − 2 bc cos B, or</h3><h3> c² = a² +b ² − 2 bc cos C</h3>
Therefore; when given all the sides or edges of the triangle;
- we can use the law of cosines to find one angle, then
- we use the law of cosines again to find the second angle, and finally,
- we use the point that angles in a triangle add up to 180 to get the third angle;
<h3 />
Answer:
The answer to your question is 4
The sum of twice a number and 6 is 4.
The inequality <span>t < -6 states that t is a number that is less than -6, that is, is at the left side of -6 in the number line. Therefore from the options given, -7 in option B is the correct answer.</span>