You can do something with it surely.

It doesn't matter if what you try first isn't the best idea. You just have to try!

Edit: neg. lol.

My advice was well meant and it is good advice.

(edited 11 years ago)

Reply 4

SophieL1996

Original post by BabyMaths

You can do something with it surely.

It doesn't matter if what you try first isn't the best idea. You just have to try!

Yes I have tried... but I cannot get the right answer, I just need someone to do the steps for me so I can have a go at some other ones...

Reply 5

TenOfThem

Original post by SophieL1996

Simplify: 5sin²3theta +5cos²3theta (1+sinx)² + (1-sinx)² + 2cos²x can you please show me step by step... :tongue:

Original post by SophieL1996

I cant do these ones

Have you even simplified the part I have highlighted

Reply 6

TenOfThem

Original post by SophieL1996

I just need someone to do the steps for me so I can have a go at some other ones...

If this were the case then you would be able to use the examples in your text or those that your teacher has given you

Reply 7

Robbie242

Original post by SophieL1996

Yes I have tried... but I cannot get the right answer, I just need someone to do the steps for me so I can have a go at some other ones...

Expand the two brackets, that should cancel some terms, then you need to use the rule

sin^2\theta + cos^2\theta=1

(same can apply for x terms btw, not just theta)

(edited 11 years ago)

Reply 8

SophieL1996

Original post by TenOfThem

If this were the case then you would be able to use the examples in your text or those that your teacher has given you

My teacher didb't really go into any of it and the examples are a lot easier than these questions, so I am stuck. Any help would be appreciated. :smile:

Reply 9

TenOfThem

Original post by SophieL1996

Yes I have tried... but I cannot get the right answer, I just need someone to do the steps for me so I can have a go at some other ones...

I have just realised these are 2 different questions

The one that I highlighted is very straightforward ... what have you tried

Then

5\sin ^2A = 5\cos ^2A = 5(\sin ^2A + \cos ^2A)

And you should certainly know what

\sin ^2A + \cos ^2A =

Reply 10

SophieL1996

Original post by Robbie242

Expand the two brackets, that should cancel some terms, then you need to use the rule

sin^2\theta + cos^2\theta=1

So far I have got 2 + 2sinx²+2cos²x
where do I go from there?

Reply 11

TenOfThem

Original post by SophieL1996

My teacher didb't really go into any of it and the examples are a lot easier than these questions, so I am stuck. Any help would be appreciated. :smile: