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

Help Need step by step working of these questions:

Freddy12345

Attached here, I will need step by step explanation because I cannot do these..

help!

I don't do AQA, but OCR Mei.
I tried question 3 but I couldn't do it, i got an acute angle
My attempt at question 4.
Hopefully, it is right

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Reply 3

solosdk

Easy easy easy! I'll help you when im on my computer

Q4 answer is wrong

7(c)Question

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Reply 6

CurtisDean

Original post by solosdk

Q4 answer is wrong

I thought it would be.. It seemed too simple to just be that.

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Umm, i did the exact same thing for question 4. ImageUploadedByStudent Room1368433894.242970.jpg

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Reply 9

solosdk

Question 7a

ImageUploadedByStudent Room1368433908.416974.jpg

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Reply 10

solosdk

Question 7b

ImageUploadedByStudent Room1368433955.348991.jpg

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Reply 11

solosdk

ImageUploadedByStudent Room1368434052.149440.jpg

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Reply 12

solosdk

ImageUploadedByStudent Room1368434126.366159.jpg

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Reply 13

solosdk

ImageUploadedByStudent Room1368434307.299391.jpg

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Reply 14

Jpeccarino

I don't have time to write it out but:

7a) Rearrange it to y/3 = 4^x. You can see that Y has been replaced with (1/3)Y. This might help.

b) Use your answer to part 1, it's a stretch.

c) Simultaneous equations. 3*4^x = 4^-x. Rearrange it to make 3 the subject. 3 = 4^x/4^-x. This gives you 3 = 4^2x. log3 = 2xlog4. This should help.

3a) well we know that a=(abSinC)/2. 12.5 = (5*6*SinC)/2. From this you know that 25 = 30SinC, and I guess you can work it from there.

b) c^2 = a^2 + b^2 - 2*a*b*CosC.

4. LogaN/x = 3/2. in exponential form this = a^3/2 = n/x. I guess you could rearrange that to find X.

I'm not too sure on question 4 but I have MPC1/2 today so I hope it's bloody right..

Reply 15

solosdk

There you go all questions answered and sorry bout q4 lol didnt realise

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Reply 16

solosdk

Remember guys, I will need everyones input whoever is doing core 1 or 2 today, for my unofficial mark scheme thread.

please post as many questions and answers you can remember in my thread and ill update it