Advanced Functions 6.2 Question 6

[@evadervishi7829]

Makes so much sense now! I was having lots of trouble with it before

[@sim6227]

Thank you so much for your effort. Great videos as usual.😀

[@toriyt3976]

Cos of 120 is also -0.5 so what should I go by. 60 or 120 I don't get that part. Should I do 180-120 to get the real results?

[@mshavrotscanadianuniversit6234]

cos60 is not equal to -0.5 but rather 0.5. (Try it on your calculator) You need to understand that there can be more than one solution where cos theta is -0.5 because the cosine function is a continuous wave or sinusoidal function. The number of solutions will depend on what the given domain is. If your domain is between 0 and 180 degrees the only solution is 120 degrees. If the domain is between 0 and 360 degrees then there is a second quadrant where cosine is negative (quadrant 3), so then you would have to give both solutions, 120 degrees and 240 degrees. You can always double check your answer with a calculator 😊

[@johnsonjogn6112]

Thank you so much for this video!!!

[@mshavrotscanadianuniversit6234]

Hope it cleared up all your problems. 😊

[@evadervishi7829]

One quick question, how do I know which special triangle to use given an angle?

[@mshavrotscanadianuniversit6234]

Well, it would have to match with the angles in the special triangle. So, if it has a 30 degree angle then use the equilateral triangle.

[@daviderickson2719]

This is fantastic, thanks so much Ms H. You are the best!

[@mshavrotscanadianuniversit6234]

So happy that you enjoyed it! ❤️

[@apapapapaple]

Thx for the amazing video!

[@mshavrotscanadianuniversit6234]

Thank you for watching! Please like, share and subscribe to increase the channel’s visibility.

[@makinu_]

Thanks for the video, do you think you’ll ever make videos for University Math?

[@mshavrotscanadianuniversit6234]

Most likely not. The universities all seem to have slightly different curriculums. Besides, I’ve been out of university for a very long time, although I did teach a first year business course for three years. Please like, share and subscribe to increase the channel’s visibility 😊