First you have to use the Pythagorean theorem to find the lenght of c which is called the hypotenuse(that is the side opposite the right angle and is always the longest side of a right triangle)



c² = a² + b² 
c² = 1² + 1² 
c² = 1 + 1 
c² = 2   ↔  c = √2
Based on what you learned from the writting the trig functions for the 30^oand 60^o angles write the 6 trig functions for a 45^o angle

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