I have this: I need to solve it. I got this: I simplified it to get: I equate it to 0 and I get: How do I solve this?
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Hello, You don't have to derivate, since it'll only (the things that could interest us) give you variations. Transform cos(3x) into a form with cos(x) and sin(x). cos(3x)=cos(2x+x) So use the following formulas : Try to get cos(3x) first...
Well I need to find all the maximum and minimum points so that is why I derived it. I guess I could do what you did and then derive it. Let me try.
I need to solve it. This was the only thing I knew you had to do Well, for solving the derivative, do the same : Formulas you need : hmmm, you'll see which one of the three below would be useful :
How do I solve: Nevermind I am dumb I got it...
---> Replace and
Using all that I "simplified" it to: Now I am stuck again...
This is correct Now you want to solve for y'=0 So Can you solve it ?
I get: I solved the first one but how do I solve the second one. I know that I need to do square root so that I get But thats not a number that I can express... Or can I? How?
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