Can you find the sum of the squared sine values?
Which is larger cos(sin x) or sin(cos x) ? Does this depend on x ?
Draw graphs of the sine and modulus functions and explain the humps.
Can you find a way to prove the trig identities using a diagram?
In this short challenge, can you use angle properties in a circle to figure out some trig identities?
If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?
Can you justify this equation involving three angles?