A community for students.
Here's the question you clicked on:
 0 viewing
sara1234
 2 years ago
Help please ?
sara1234
 2 years ago
Help please ?

This Question is Closed

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0you are looking for the number between 0 and \(\pi\) whose cosine is \(\frac{1}{2}\)

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0if you still have that cheat sheet, look at the place on the upper half of the unit circle where the second coordinate is \(\frac{1}{2}\)

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0ok here is the picture dw:1351127015253:dw

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0in this picture, \(\theta=\arctan(2)\) an angle whose tangent is 2 since tangent is "opposite over adjacent" i labelled the opposite side 2 and the adjacent side 1

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0the hypotenuse we find by pythagoras, it is \(\sqrt{1^2+2^2}=\sqrt{1+4}=\sqrt{5}\)

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0and using sine as "opposite over hypotenuse" we see that the sine of the angle is \[\frac{2}{\sqrt{5}}\]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.