Trigonometry is the branch of mathematics that explains the relationship between sides and angles of a triangle. In a right angled triangle the three sides are perpendicular, base and hypotenuse, as ...

N-trig’s DuoSense Pen 2 only ships with specific tablet and laptop lines for Windows and Android, but if you’re Considering getting one of those setups, it’s a nice built-in accessory. In my travels, ...