A community for students.
Here's the question you clicked on:
 0 viewing
farah2318
 2 years ago
why is
9sin(pi/3)= 9sqrt3/2
and
3tan(pi/4)=3
and
2 sec(pi/3)=4
and
5 cos(pi/4)= 5sqrt2
how would i figure these out?
farah2318
 2 years ago
why is 9sin(pi/3)= 9sqrt3/2 and 3tan(pi/4)=3 and 2 sec(pi/3)=4 and 5 cos(pi/4)= 5sqrt2 how would i figure these out?

This Question is Open

timo86m
 2 years ago
Best ResponseYou've already chosen the best response.0try using the unit circle

farah2318
 2 years ago
Best ResponseYou've already chosen the best response.0how would i memorize all of that

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.0Continuously draw the unit circle?

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.0That's how it works for martial arts, biology and combat situations :

farah2318
 2 years ago
Best ResponseYou've already chosen the best response.0do they have unit circle for tan and sec?

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.0here's what it says in my book

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1347081765068:dw That suffice?

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.2i would advice you to atleast remember these 3 values : \(sin (\pi/6)=0.5\) or sin 30 =0.5 \(sin (\pi/3)=\sqrt{3}/2\) or sin 60 =\(\sqrt{3}/2\) \(sin (\pi/4)=1/\sqrt{2}\) or sin 45 =\(1/\sqrt{2}\) then you can easily derive any ratio with angles 30,45,60 degrees, using standard formulas like sin x= cos (90x) or cot x =cos x / sin x say cos 60 = sin (9060)= sin 30 = 0.5 tan 45 = sin 45 / cos 45 = sin 45 / sin (9045) = sin 45/sin 45 =1

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.2from your question 2 sec \( \pi/3\)= 2/(cos\( \pi/3\) )= 2/(sin (\(\pi/2\pi/3))\)=2/sin \( \pi/6\)=2/0.5=2*2=4 5 cos (pi/4)=5 sin (pi/2pi/4)= 5 sin (pi/4) = 5/sqrt 2
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.