Find the exact value of the trigonometric expression when sin(u) = − 5/13 and cos(v) = − 4/5. (Both u and v are in Quadrant III.)
cos(u + v)

inch

step-by-step explanation:

yard and mile are too big.

the answer is 3/2 and for decimal: 1.5

hope i

-lavira: )

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.