Use the Special Right Triangle to evaluate sin 45°, cos 45° and tan 45°. This question has already been posted but it wasn't explained how they got the answer.

Question

anonymous · Answer

You will have a ninety degree angel and two 45. The rule for 45 special triangles is|dw:1401492536858:dw|

anonymous · Answer

Sorry, @nelsonjedi I still don't understand very well :/. Am I on the right track with this? Sine=opposite/hypotenuse sine=x/x(sqrt{2}) 
Cosine=adjacent/hypotenuse cosine=x/x(sqrt{2})
Tangent=opposite/adjacent tangent=x/x

anonymous · Answer

Winner winner chicken dinner,,,great job   now you need to simplify....

anonymous · Answer

Alrighty...
Sine=x^2/sqrt(2)
Cosine=x^2/sqrt(2)
Tangent=1
Is that simplified? Never been good at simplification.

anonymous · Answer

The x values cael each other out...the we multiply the top and bottom by sq root of 2 get get the irrational out $$\frac{ x }{ x \sqrt{2}} = \frac{ 1 }{ \sqrt{2} } = \frac{ \sqrt{2} }{ 2 }$$

anonymous · Answer

Thank you so much! You were a great help @nelsonjedi