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problem
Curved square
Can you find the area of the central part of this shape? Can you do it in more than one way?
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problem
Trig identity
In this short challenge, can you use angle properties in a circle to figure out some trig identities?
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problem
Calculating with cosines
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?
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problem
Tangled trig graphs
Can you work out the equations of the trig graphs I used to make my pattern?