SOLUTION: My homework is asking me to find the exact value of the trigonometric function given: sin 11Pi/4 what i have done so far is taken 11/4 and subtracted 2, which gave me 3Pi/4,

Algebra ->  Trigonometry-basics -> SOLUTION: My homework is asking me to find the exact value of the trigonometric function given: sin 11Pi/4 what i have done so far is taken 11/4 and subtracted 2, which gave me 3Pi/4,       Log On


   

Question 625392: My homework is asking me to find the exact value of the trigonometric function given:
sin 11Pi/4
what i have done so far is taken 11/4 and subtracted 2, which gave me 3Pi/4, but it is still asking me to elaborate more and the final answer has a radical in it. I am so confused and dont understand how to further my answer. I dont understand where the radicals are coming from.
Thank you.
Answer by reynard2007(52) About Me  (Show Source):
You can put this solution on YOUR website!
Your first step of taking the 2pi out is right. So now you are left with sin%283pi%2F4%29. 3pi%2F4 is in radian measure. In degrees it is equal to 135deg. The sin of 135 is sqrt%282%29%2F2. The radical should be there.