## iluvvyyhu Group Title May someone show me how to solve this problem? Find the exact value of the trigonometric function. Do not use a calculator. 5) sin 5π/4 one year ago one year ago

1. iluvvyyhu Group Title

Please :( can someone help me, its pre-calc

2. Hero Group Title

Hint: Let $$\pi = 180$$

3. iluvvyyhu Group Title

-_- omg... is it -sqrt2/sqrt2?

4. Hero Group Title

Yup, you got it

5. iluvvyyhu Group Title

lol i feel so dumb now lol XD thanks!

6. Hero Group Title

Why? The technique of letting pi = 180 is not very popular.

7. Hero Group Title

In fact, your teacher may not approve of the steps

8. iluvvyyhu Group Title

oh because in my class we had to draw out a circle with different measuements and memorize it, and i completely forgot that i was supposed to use the circle to solve it

9. Hero Group Title

I mean I would solve it algebraically as you have using the substitution of pi with 180, but the thing is, now that you know what the exact value is, you can still do it the way your teacher wants.

10. Hero Group Title

letting pi = 180 saves you from having to memorize the circle.

11. Hero Group Title

There's another technique that amistre 64 knows that's a huge shortcut for memorizing the unit circle that I know you would like. Ask him about it.

12. iluvvyyhu Group Title

Oh okay thankyou(: I'd rather do that than draw out a circle everytime lol