How does cos alpha divided by cos theta = cos alpha?

This is from an MEI 2006 C4 paper, in the mark scheme they have divided through by cos theta, but I can't understand how this leaves you with just tan theta, cos alpha, not tan theta cos alpha/cos theta?

thanks!

What you are saying is the equivalent of saying $\frac{xy}{y}=\frac{x}{y}\cdot \frac{y}{y}$

Clearly it is wrong.

If you were to take an odd and even number as being two separate values and one plus one then you know this wouldn't work here because it is arithmetic but cosine and sine are the sum of a perfect geometric series so it's possible they take the values x and y and you're proof might be correct as long as the values are in phase and y gives the value 1 all times.

If you were to take an odd and even number as being two separate values and one plus one then you know this wouldn't work here because it is arithmetic but cosine and sine are the sum of a perfect geometric series so it's possible they take the values x and y and you're proof might be correct as long as the values are in phase and y gives the value 1 all times.

This is from an MEI 2006 C4 paper, in the mark scheme they have divided through by cos theta, but I can't understand how this leaves you with just tan theta, cos alpha, not tan theta cos alpha/cos theta?

thanks!

What...?

I have explained above.

You were only asked to get to the end sometimes, and I checked with a guy using a program like Matlab and sometimes the questions aren't really solvable. But you just have to get to the end there you don't have to find the value.

It could be taken from another set of questions from a university book just know how to get a solution from the left hand side of a trig identity when it's given to you.

I have explained above.

What you are saying is the equivalent of saying $\frac{xy}{y}=\frac{x}{y}\cdot \frac{y}{y}$

Clearly it is wrong.

patronising arse ))

Your posts are complete rubbish to be frank!

Please don't troll other people's threads if you don't know what you're talking about - you will only confuse the OP.

Well that is what you said you put it as.

I didn't say I put anything, I was asking for an explanation to how that method works as I don't understand it...