Can you deduce the familiar properties of the sine and cosine functions starting from these three different mathematical representations?
Can you sketch this tricky trig function?
Trigonometry, circles and triangles combine in this short challenge.
Can you prove this formula for finding the area of a quadrilateral from its diagonals?
An equilateral triangle is constructed on BC. A line QD is drawn, where Q is the midpoint of AC. Prove that AB // QD.
How would you design the tiering of seats in a stadium so that all spectators have a good view?