Trigonomety R addition formula

[@ahmaddesign7928]

Hi Sarah, you are teaching well, I'm a civil student too.

[@zaraspewinstonkempuntalanu6141]

Hi ! Amazing video as always, just asking, what if at 10:54, instead of cubed, its squared, (5 cos theta + 12 sin theta )^2. Would we then need to make cos (theta -67.4) to 0 instead of -1?

[@rozanaiman]

Thank you!!!

[@_stripyzebra7949]

at 13:06 you add 2pi to find potential additonal values. how are you sure there are no other values between 2.94 and (2.94+2pi). please answer. btw your content is great!

[@godwinjeemonjoseph598]

she found the values for the first wave which is from 0 to 2pi as there were no more values in this range she went outside that range given in the question just incase that value will always repeat every 2pi so she added to 2 pi to the first value

[@godwinjeemonjoseph598]

use the sin graph to help it helps me a lot and mark the 0.20 angle make sure it is in radians and then draw a horizontal line through the graph to fin the rest of the solutions in the given range

[@ockham1963]

Really well explained

[@StarfishMaths]

Thank you!

[@salomeagnes5766]

loved it

[@essiemasembe2507]

Thanks alot