GCSE Maths | 3D Trigonometry

* volume of cone = 1/3 x π x r2 x h * volume of frustrum = volume of big cone - volume of small cone * the small cone and big cone are similar shapes * the

* Area of a sector = πr2 x (x/360o) * Arc length = 2πr x (x/360o) Question 1 Find the area of the sector Question 2 Find the radius of the sector Question 3 Find

* Only applies to right-angled triangles * Pythagoras theorem * a2 + b2 = c2 where c is the longest side * SOH CAH TOA (form pyramids) * sin(x) = O/H * cos(x) = A/H * tan(x) = O/A