A community for students.
Here's the question you clicked on:
 0 viewing
AonZ
 3 years ago
Eliminate A from each pair of parametric equations
x = 2tan( A/2)
y = cosA
AonZ
 3 years ago
Eliminate A from each pair of parametric equations x = 2tan( A/2) y = cosA

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0$$\large{ 2 tan\pmatrix{\frac{a}{2}}=2\pmatrix{\frac{1cos(a)}{sin(a)}}\\ \color{red}{y} = \color{blue}{cos(a)} \ \ \ thus\\ 2tan\pmatrix{\frac{a}{2}}=2\pmatrix{\frac{1y}{sin(a)}} \implies \pmatrix{\frac{22y}{sin(a)}}\\ x=\frac{22y}{sin(a)} \implies \color{blue}{sin(a)} = \color{red}{\frac{22y}{x}} } $$

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then just use the identity of \(\large sin^2+cos^2 =1\) to get your equation

AonZ
 3 years ago
Best ResponseYou've already chosen the best response.0how does \[{ 2 \tan\pmatrix{\frac{a}{2}}=2\pmatrix{\frac{1\cos(a)}{\sin(a)}}\\ }\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0http://www.freemathhelp.com/images/halfangles.png halfangle identities, check your textbook formulas, or a formula cheatsheet you may have

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the picture there shows 2 for tangent, there are 3, at least on my sheet :)
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.