Trigonometry - Short Problems

A collection of short Stage 4 problems on trigonometry



Weekly Problem 28 - 2008

Stage: 3 and 4 Challenge Level: Challenge Level:1

The diagram shows a semi-circle and an isosceles triangle which have equal areas. What is the value of tan x?

Weekly Problem 43 - 2009

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

This diagram has symmetry of order four. Can you use different geometric properties to find a particular length?