Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
adnanchowdhury
Group Title
Trigonometry question on R cos (theta  alpha). http://d.pr/L96v
 2 years ago
 2 years ago
adnanchowdhury Group Title
Trigonometry question on R cos (theta  alpha). http://d.pr/L96v
 2 years ago
 2 years ago

This Question is Closed

adnanchowdhury Group TitleBest ResponseYou've already chosen the best response.0
Second part of the question is what i need help with. My answer to the first part: \[\sqrt{17} \cos (\Theta + \alpha)\] Second part: My answers are: 46.9 and 46.9. But answers says: 46.9 and 75?
 2 years ago

adnanchowdhury Group TitleBest ResponseYou've already chosen the best response.0
Edit: I mean to write, the answer to my first answer was √cos(Θ+14)
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
[r\sin(x+\theta)\] where \[r=\sqrt{a^2+b^2}, \tan(\theta)=\frac{a}{b}\]if i recall correctly
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
oops you want cosine, sorry
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
same idea but this time \[r\cos(x  \theta)\] same r but \[\tan(\theta)=\frac{b}{a}\]
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
so we need \[\theta\] in degrees i take it, yes?
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
i get \[\theta = 14.4\] giving \[\sqrt{17}\cos(x+14.4)\]
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
\[\sqrt{17}\cos(x+14.4)=2\] \[\cos(x+14.4)=\frac{2}{\sqrt{17}}\] \[x=\cos^{1}(\frac{2}{\sqrt{17}})14.4\]
 2 years ago

adnanchowdhury Group TitleBest ResponseYou've already chosen the best response.0
between 180 and 180 degrees.
 2 years ago

adnanchowdhury Group TitleBest ResponseYou've already chosen the best response.0
Mark scheme: http://d.pr/ubFq Where does the value 75 come from?
 2 years ago
See more questions >>>
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.