you saved me because I will have test on this next week. I didn't know much about this topic. my class teacher used graphs for this and I didn't get anything. thank you so much , you made this so easy.
this is the only topic i dreaded (oh, and functions too.) to do because i could not seem to understand a word my teachers said, but you literally made it so easy and fun. I am so thankful to you. May God bless you.
I've been making the mistake of dividing the angle first then using to find my solutions for a very long time.... Thank you for correcting me before my final exam next month!!
Thank you so much, all your videos are so helpful!Amazing channel.:)I had a slight doubt in the last question in the end why do you change the angle values to +/- when multiplying by 3 to find 4 theta?
Great video. I would have struggled with this concept for a while had I not come upon your channel. I'm glad you changed the range in the examples; it made it all click.
Thank You, This was really helpful. Just wanted to know why it would be wrong if you divided the first equation by 2 on both sides before doing anything else. When can you simplify equations by doing that then?
Thanks for the videos! Do we have to always do a cast diagram for these types of trig questions? As for some e.g. tan of an angle, I know the period of the tan graph is 180 degrees/pi, so I just keep adding or subtracting 180 degrees from the calculator solution for alternative solutions until I'm out of range. Would this also be acceptable? (for A2 edexcel maths) Thanks
Yes but you can be in the 1st and 2nd quadrants for sinθ being positive (60 and 120 degrees) and 3rd and 4th quadrants for sinθ being negative (240 and 300 degrees)
Thank you very much for these helpful and informative videos. However, I'm very confused due to the ending. Isn't 4/3 of 45 degrees 60? Not 33.75? And vice versa for -315, -420 degrees, not -236.25?
I appreciate your videos a lot but here you show a pretty complicated technique to solve the equations whereas they are done in a different and easier method in the examples of the books.