## Trigonometry (10th Edition)

1. 0-90 degrees in the first quadrant. Therefore 0$^{\circ}$$\leq75^{\circ}$$\leq$90$^{\circ}$ 2. Coterminal angles always in the same quadrant with original angle, because of full resolutions (2k$\pi$) 75° + 360° = 435° 75° - 360° = -285°