You are Here: Home >< Maths

# Advanced higher maths holiday hw Watch

1. Okay so this is my first set of hw for advanced maths and tbh I'm struggling and it's level c questions!!
If anyone could help with any of 1m, 4, 5, 8b and all of 9 that would be great!!

1m. -3/ 1+sin3x
4 and 5 is proof
8b. 25
9 is all proof

Working would be really helpful as well! And I'm not a complete fool as I managed to complete my other hw fine but I just can't do this differentiation that great yet but practice makes perfect I guess! Thanks in advance
Posted from TSR Mobile
Attached Images

2. (Original post by grumpylamb)
...
Looking at 1m to start, what's the problem? If you've done the others, I presume you're fairly competent with the product/quotient rules and just having problems with the algebra.

Post some working.
3. (Original post by grumpylamb)
Okay so this is my first set of hw for advanced maths and tbh I'm struggling and it's level c questions!!
If anyone could help with any of 1m, 4, 5, 8b and all of 9 that would be great!!

1m. -3/ 1+sin3x
4 and 5 is proof
8b. 25
9 is all proof

Working would be really helpful as well! And I'm not a complete fool as I managed to complete my other hw fine but I just can't do this differentiation that great yet but practice makes perfect I guess! Thanks in advance
Posted from TSR Mobile
for 1m
Use the quotient rule and simplify

Here

for 4
Diffeerentiate y with respect to theta using the quotient rule -> y'=
Differentiate one more y' -> y" =
Substitute these in the equation.

for 5
Differentiate y twice using the product rule then the quotient rule, and use some trigonoimetric identities

Taking out e^x and using trigonometric identities

From this you will get the answer

8b)

Differentiate both side with respect to x
on the LHS and RHS

divide by 2A and you will get A'-

A has maximujm when A'=0

for 9
THe perimeter

solve for h

THe area

Sub h the terms above
For maximum

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: August 15, 2013
Today on TSR

### Oxford grad sues for £1m

Claims damages because he didn't get a first

### 'No evidence of shots fired' at Oxford Circus

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.