Trigonometric Identities

In this video I explain how to use identities to solve problems. This video is intended for those studying AQA's Level 2 Further Maths GCSE.

[jameshickie]

bro saved me, im trying to learn 100 hours of content the night before the exam...

[CarbonFisherman]

Recently found your chanel and I love your videos. Clear and concice. Keep it up!

[zanonoza]

Your explanation is top-notch 👍. You're are saving me.

[study_odyssey]

This video was super helpful!!! Wishing the best for you!!!! Thank you so much!!!!

[KeepingUpWithKpy]

Brilliant video once again!!! You have now become my trusted go-to online tutor 🙏 thank you for all you do

[ee-tgzt]

For the first example you showed, couldn’t I add cos(theta) to both sides and then factor out 2, then use the cos^2 + sin^2. If not why can’t I do that 5:00

[miriellemills]

Perfectly explained. Thank you so muchh🎉❤

[jamiespurling]

got some of it but the last one was to difficult . Understood alot of it though

[Saintcandor]

Bro thank you so much for the vids they really helped today on paper 1

[RedditsFunTales]

Just learning trig identities for the upcoming further paper, for the question at 5:08 i did it differently, i added the sin^2 + cos^2 to get sin^2 + 1 = 2 - cos^2. then moved the cos^2 to the other side of the equation to get sin^2 + cos^2 + 1 = 2. as sin^2 + cos^2 = 1, 1+1 = 2. so therefore 2=2. is this correct?

[emilkeys]

Is sin^2(x) + cos^2(x) = 1 and extension of Pythagoras? Assume you have a right angled triangle with a hypotenuse of 1, by definition, the opposite side would be sinx and the adjacent side would be cosx. From this, if we apply Pythagoras theorem, we get the original sin^2(x) + cos^2(x) = 1 equation. I might be wrong, but it seemed like an interesting coincidence.

[toasinmahmud]

Don't mind but why these equations are basic
In CIE syll, they are learnt in pure maths which is also later used in further math

[ivy]

if this topic comes on paper 2 im finished

[samanvithabhat]

When you factorise sin^4x + sin^2xcos^2x + cos^2x, why are you able to just ignore the cos^2x

[lilysmith]

will we get these equations in the exam, do you know?