A community for students.
Here's the question you clicked on:
← 55 members online
 0 viewing
anonymous
 3 years ago
Solve the diff equation.
dr/dø +r*tan(ø)= sec(ø)
anonymous
 3 years ago
Solve the diff equation. dr/dø +r*tan(ø)= sec(ø)

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I just got. r^2/2 + r = tan(ø) + c

.Sam.
 3 years ago
Best ResponseYou've already chosen the best response.0try let\[\lambda (ø)\text{ = }\exp (\int\limits \tan (ø) \, dø)\text{ = }\sec (ø)\] then \[(\sec (ø) \tan (ø)) r(ø)+\sec (ø) \frac{dr(ø)}{dø}\text{ = }\sec ^2(ø)\] \[substitute, ~~\sec (ø) \tan (ø)\text{ = }\frac{d\sec (ø)}{dø}\] \[\frac{d\sec (ø)}{dø} r(ø) +\sec (ø) \frac{dr(ø)}{dø}\text{ = }\sec ^2(ø)\] then use reverse product rule see if it works
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.