Resuelve las siguientes ecuaciones trigonométricas, hallando la primera respuesta con tu calculadora y si el ángulo es negativo hacer dar la vuelta con el circulo trigonométrico.

2senx − 1 = 0

secx = 4cosx

2cos2 − 5cosx + 2 = 0

sen2x + 3cos2x = 2

tan2x ∗ cosx + cos2x = 1

What is x3+3x2−16x−48 divided by x−1?

The function models the number of accidents

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.