General solution grade 12 Trigonometry

General solution grade 12 Trigonometry

[surprisendlovu]

For question 2, if you use 90+n.360, would it be wrong?

[nakhanezulu]

why dont you add the minus when working out shift sine of -1/2 on the calculator?

[TheMrIndividualist]

3:40 Question 2, could we divide both sides by cosx?

[NontandoMbeje]

Sir for question 2 is it fine if we use the quadrants 1 and get x=90+k.360;... & Quadrant 4 x=270+k.360;...?

[thando_tlng]

5:31 nope sir my teacher did not teach me thank you for highlighting that ❤

[inaminkosi]

Life saver, thank you sm, God bless you!!!

[itsyokirlvee]

So if we have this kind of scenario (where cosx=0)we will Only have 90+n.180;nez?? And no other solution?

[thando_tlng]

MR KEVIN
THE compound formula says for sin
Sin ( A - B ) = Sin A . Cos B - Cos A . Sin B
1:24 but here I am seeing Sin, Cos, Sin, Cos not Sin, Cos, Cos, Sin
So does the order matter?

[Ndiwa.]

Hi sir. For the second one, by dividing by cos on both sides i still mamaged to get 30° in the correct quadrants too. I believe this may be a coincidence however would you mind explaining exactly why we cant divide by cos. Pleaseee.

[kingcado]

Thanks, please do calculus of motion and rates

[thando_tlng]

5:25 Sir so if it was sin I was going to use 180
And say
X=90 + n . 180

[NontandoMbeje]

Sir which one do we use? n.360 or k.360😭 I'm confused?

[mandisamabika]

Mr Kevin what happens when you are given this sin2©=cos© and you are required to give general solution?

[ffunitsk]

Sir, how do you know which questions require a certain kind of approach ?

[ek]

Idk why we add n.360 thats what confuses me 😢

[Abdul_Basit_Mohammad]

do you use a mouse or a pen when you solve all these questions? i can't imagine how hard it is to use a mouse or a touchpad.

[anastaciareed]

Sir, in an exam, how would you know to use this instead of stopping at a certain point?

[rishongileshikwambani]

Sir, is it also the same for other trig ratios? 5:19

[inamnontangana]

for question 2, is it wrong write +/- 90 + 180k ?

[lelo_m]

Sir why don't we include 360-30 in the first one