Відео

Thank you 👍

No problem 👍

No problem. Glad the video helped👍

Best of luck. Hope the video helps 👍

You’re welcome 😃

Thank you for leaving such a nice comment. I appreciate it and plan to start making videos again in the autumn. I hope your studies go well and wish you all the best.

You have to make sure your calculator is set in radians. You also might be getting an answer that is equivalent. For example 1/sqrt(2) is the same as sqrt(2)/2.

The question should give a clue about what the total should be.

No problem. Glad I could help 😃

Best of luck 👍

No problem 👍

You're welcome :)

Unfortunately there isn't a factorial button on this model.

A few people have mentioned this before because the FX991ES doesn't seem to have the factorial function.

Thank you.

No problem. Best of luck with your studies.

The two answers are equivalent because the difference is 2*pi as you've mentioned. Some university courses want an answer between 0 and 2 pi, whilst others want answers from 0 to pi / 0 to minus pi. There isn't a standard convention for this which is why sometimes you will get different (but equivalent) answers in this type of problem.

Try splitting the right-hand side into two fractions. Then apply the ideas shown in the video.

No problem. I'm glad the video helped 😃

Thank you

3y means 3*y. Therefore 3y/2 is the same as 3/2*y. You can test this on your calculator. For example, if y=4 then (3*4)/2=6 and (3/2)*4=6. Hope this helps.

It is standard to use the principle argument which is the fraction in it's lowest form. For example, cos(pi/4) is the same as cos(9pi/4) and cos( 17pi/4) etc, the only difference is that 2*pi has been added to take account of one revolution around the unit circle. However your teacher might be asking you to consider the odd and even nature of sine and cosine functions. For example cos(pi/4) is the same as cos(minus pi/4), which is also the same as cos (7pi/4). I would need to make a separate video to cover this but you can find out more information if you research the properties of the unit circle.

@@DavidWrightUK ohh. I now understand. Thanks a lot.

1.5 x 115 is pretty quick on a calculator. If you are doing the calculation in your head then you could add on 50% of 100 first, giving 150. Then add on 50% of 15, giving 22.5. The total is therefore 172.5.

And how would you do one in the third quadrant?

It is convention to regard the third and fourth quadrant as the negative direction so that none of the angles are more than plus or minus pi.

@@DavidWrightUK thank you. Lost sleep over this question haha

You're welcome. I'm glad the video was helpful 😃

Appreciated, thank you 👍

I'm glad the video helped and wish you all the best with your studies 👍

No problem. Glad I could help 👍

😎

That's a long night. Hope the test goes well 😀

Mine doesn't either but that's because mine doesn't need shift to use the % sign. It's a simple calculator with everything on the one level. I presume here that the sophisticated calculator needs Shift like you use it typing on a computer keyboard. This video has been a real help to me. I could only do the calculation with pen and paper.

@@susanallan-c4828 Thank you for leaving a comment. When I made the calculator videos I didn't realise that there was such a wide variety of models that differ from country to country. I'm glad that the video helps for simple calculators with a % button. Percentages are not too bad after a bit of practice.

Then swift the calculater

No problem. Good luck with your studies 😀

Thanks 👍

I'm glad the video was useful. Best of luck with your studies.

Thank you. I'll keep this in mind 👍

Glad the video helped :)

I'm pleased the video helped. Best of luck with your studies.

Thank you 👍

Sorry I can't help but I've only used Casio calculators so don't know how to do it on other makes and models.

One way to simplify this question is to note that (ax+b)/(cx) = ax/cx + b/cx = a/c + b/cx . If you apply this simplication step the methods in the videos should help you find the answer. Hope this helps.