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s.h_math s.h_math
wrote...
Posts: 276
Rep: 3 0
3 weeks ago
Hoping all is well.

Im sorry this is short notice. I’ve just realized I have a calc lab tmr instead of next week. Is it possible for you to solve these as I am having trouble.

It would mean a lot so I can practice them as 2 of them will be on the lab for assessment.

Thanks a lot!!!


Lab Questions
(Jan 22-26 )
Question 1 Find the domain and range of \(f(x) = \sqrt{2+x-x^2}+1\)
Question 2. Find the domain of \(\cos^{-1}(1-x^2)\)
Question 3. Sketch y =—2 sin(2x) + 1.
Question 4. Find all values of x in the interval from O to \(2\pi\) satisfying the equation

\[2 = \cos(2x) = 3 \cos(x) \]
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wrote...
Educator
3 weeks ago Edited: 3 weeks ago, bio_man
Q1.



Method used: https://youtu.be/Z9eCNdteloE?si=0FqL1PoxLA4baJwW&t=168

Q2.




Q3.



Method used:



Q4.

Attached.

Method:

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s.h_math Author
wrote...
2 weeks ago
Im sorry bioman but for q4 it just shows me a black screen
wrote...
Educator
2 weeks ago
Strange it works fine for me, here's a screenshot
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s.h_math Author
wrote...
2 weeks ago
Thank you so much; I'm just working on number 4 now. I appreciate you helping me. The past couple of years have been beneficial bc you make sure I understand important concepts & linking your videos to this is a big bonus for me, as my math has always been weak.

wrote...
Educator
2 weeks ago
no worries man!

Can you respond to your other lab question?
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