Year 12s: what will be the first way you research your future options? >>

I forgot how I did it D:

I did this past paper before and when I looked at my working out I got the solutions correct. Now looking back at how I did it, I can't remember the steps I took - I think I forgot this topic due to not revising :tongue:

Help me please, how do you do it??

EDIT: I did part a) already

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Reply 1

04ayasin

You have to use double angle formulae for part 2 I think.

bump

Original post by Sokka

Help me please, how do you do it??

EDIT: I did part a) already

Original post by 04ayasin

You have to use double angle formulae for part 2 I think.

This is not necessary. Just take the inverse tan, get your values then double them.
For the last part either part of the product could be zero so solve each for 0.

Hint

Reply 4

Sokka

Original post by Potassium^2

This is not necessary. Just take the inverse tan, get your values then double them.
For the last part either part of the product could be zero so solve each for 0.

Hint

you're awesome!!!!! :biggrin: