Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

ParthKohli Group TitleBest ResponseYou've already chosen the best response.2
\[\left(\cos^2 \theta  \sin^2 \theta\right) = 1\]\[\implies \cos(2\theta) = 1\]\[\implies \cos(2\theta) = 1\]Or use either of the two identities:\[\cos^2 \theta = 1  \sin^2 \theta\]\[\sin^2 \theta = 1 \cos^2 \theta\]
 3 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.2
or ... ANOTHER WAY! \[\sin^2(\theta)\cos^2(\theta)=1 \] Recall \[\sin^2(\theta)+\cos^2(\theta)=1\] So add \[\cos^2(\theta)\] on both sides to use the identity that is being recalled \[\sin^2(\theta)+\cos^2(\theta)\cos^2(\theta)=1+\cos^2(\theta) \] Now use the identity \[1\cos^2(\theta)=1+\cos^2(\theta)\] \[2=2\cos^2(\theta)\] \[1=\cos^2(\theta) \] which results into two equations
 3 months ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.2
Just add those two equations to get \(2\sin^2 \theta = 0\).
 3 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.2
oh yeah that is pretty too
 3 months ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
This problem can be done in several ways. I was going to write some of them here, but I guess, they will all be actually similar to each other. But @myininaya and @ParthKohli have done well to find 2 of them.
 3 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.2
3 of them actually
 3 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.2
parth did one way at first then he found another way off what i was doing
 3 months ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.2
why are you typing like satellite does
 3 months 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.