Question

I need some help with trigonometry?

Answer 1

Find angle x?

Answer 2

You dont have another angles ???

Answer 3

Diagonal of a 1x1 square? 45º.

Answer 4

how do you know whether to do tan,cos or sin?

Answer 5

In this case, you need to have memorized a 45-45-90 right triangle.

sine, cosine, or tangent is dictated by necessity. Ask questions of yourself. What do I have? What do I not have? What do I need? Can I get it? Do I have any other stuff that might help crammed in my head? Why, exactly, do they want me to do yet another "identity" proof?