A community for students.
Here's the question you clicked on:
 0 viewing
radh
 2 years ago
Find each exact value if 0 < x < pi/2 and 0 < y < pi/2 .
radh
 2 years ago
Find each exact value if 0 < x < pi/2 and 0 < y < pi/2 .

This Question is Closed

radh
 2 years ago
Best ResponseYou've already chosen the best response.01. cos (x + y) if sin x = 5/13 and sin y = 4/5 2. sin (x – y) if cos x = 8/17 and cos y = 3/5 3. tan (x – y) if csc x = 13/5 and cot y = 4/3

waterineyes
 2 years ago
Best ResponseYou've already chosen the best response.5In first case, you are to find cosx and cosy..

waterineyes
 2 years ago
Best ResponseYou've already chosen the best response.5Using the identity : \[\cos^2(x) + \sin^2(x) = 1\]

waterineyes
 2 years ago
Best ResponseYou've already chosen the best response.5Then after finding you are supposed to use : \[\cos(x+y) = \cos(x) \cos(y)  \sin(x) \sin(y)\]

radh
 2 years ago
Best ResponseYou've already chosen the best response.0Thanks for the method. I wasn't sure what I was supposed to use here.

waterineyes
 2 years ago
Best ResponseYou've already chosen the best response.5Must remember for the intervals you are given with.. x and y are in 0 to 90 interval, and all trigonometric ratios in this range will be positive..
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.