The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...

For a right-angled triangle ... ¹ function takes the answer to adjacent ÷ hypotenuse (in this example, 16/32), and gives the angle Ɵ. To find Ɵ, calculate cos⁻¹ (16/32).

The right angle drill is pretty versatile and can be useful in nearly any DIY project that gets you into tight spaces, such ...