# Posts by pip

Total # Posts: 12

Trig
Two rays with common endpoint O form a 30 degree angle. Point A lies on one ray, point B on the other ray, and AB=1. What is the maximum possible length of OB?

Precalc
Screenshot of my solution here (get rid of all spaces and the url should work): lh3. googleusercontent. com/-Tpu8S83BSbc/Vy1oGcAFEiI/AAAAAAAAD-Q/LDg0yszPVOcN8pWYNyH11rLstx00HpSKQCK8B/s512/2016-05-06. png Can someone check it please?

Precalc
Oh wait, I think I'm onto something and might have the solution! (Hopefully it's right... I think I'll post it on here when I'm done for confirmation)

Precalc
Let x, y, and z be real numbers such that cos(x) + cos(y) + cos(z) = sin(x) + sin(y) + sin(z) = 0. Prove that cos(2x) + cos(2y) + cos(2z) = sin(2x) + sin(2y) + sin(2z) = 0.

Physics
A plane flies at 220 km/h toward the south as observed by a person on the ground. The airplane pilot measures an air velocity of 2.8 x 105 m/h south. What is the velocity of the wind that affects the plane?

Algebra
Paul charges people \$25 to test the air quality in their homes. The device he uses to test air quality cost him \$500. a.) Write an equation that describes Paul's net profit as a function of the number of clients he gets. b.) How many clients does he need to break-even (...

math/algebra
350