Trigonometric ratios are used to find the unknown side or angle of a right-angled triangle. There are three different trigonometric ratios, \(\sin(\theta), \cos(\theta)\), and \(\tan (\theta)\). Each ...

Abstract: X-ray flat surfaces utilized in most advanced light sources have posed challenges to achieve form accuracy of PV 2 nm, RMS 0.2 nm and RMS 50 nrad ...