How would I go about solving this? (will give medal & fan)

(posting question in comments)

Question

How would I go about solving this? (will give medal & fan)

(posting question in comments)

anonymous · Answer

$$\sin(\frac{ 3\pi }{ 4 })$$

anonymous · Answer

I know that the thing in the parenthesis is a radian or whatever it's called (the unit aside from degrees used to measure angles)... but I don't exactly know how to find the sine of it...

anonymous · Answer

1 minute

anonymous · Answer

can you show me your work to explain how you got that please?

anonymous · Answer

ok

anonymous · Answer

Because 1 minute isn't an option for me...

anonymous · Answer

$$1/\sqrt{2}$$

anonymous · Answer

no that wasnt an anser i just said like wait 1 mainute:]

anonymous · Answer

My options are:$$-\frac{ \sqrt{2} }{ 2 }$$$$\frac{ \sqrt{2} }{ 2 }$$$$\frac{ \sqrt{3} }{ 2 }$$$$\frac{ 1 }{ 2 }$$

anonymous · Answer

yes then it would be $$\sqrt{2}/2$$

anonymous · Answer

because that is an alternative form of the answer

anonymous · Answer

oh okay but how did you get that? i just want to know so i know for future reference lol

anonymous · Answer

sorry dont know i just looked it up on WolframAlpha :/
good luck.

anonymous · Answer

oh lol that's fine, thanks anyway!