trig

[viral grove]

Apparently you do this using pythagoras

how?

part b

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[summer violet]

You need to send the full question

[summer violet]

It’s not Pythagoras

So C1 will rearrange to cos y=1/2x

And C2 rearranges to sin y = x

P is the intersection of the two curves, i.e the x coordinate is the same

[summer violet]

So we can say that 2 cos y = sin y

sin/ cos = tan

So 2= tan y

[viral grove]

Yes I got part a

I needed help with part b

Specifically the "uses Pythagoras directly" method

[summer violet]

I genuinely think it would be easier to use the trig identities just because over A levels you need to know them inside and out

What have you done so far @viral grove

[viral grove]

I'll just stickk with the trig identities

I understood the trig identities, it's enough