maths q help!!

charfreemannn

i need help with this q

Reply 1

charfreemannn

don't understand how you turn sec2^a and tan2^a into cos/sin format

(edited 2 years ago)

Reply 2

charfreemannn

anyone??????????????????

Reply 3

Muttley79

Original post by charfreemannn

anyone??????????????????

What have you tried?

Reply 4

Faith&hardwork

Where do you need help?

Reply 5

charfreemannn

Original post by achieve526kk

hope fullt this helps i tried me guess

omg thank u so much. i hate to be that person but do you mind taking another pic? it's a bit blurry and i can't make out the last part. thank u so so much btw

Reply 6

mqb2766

Original post by achieve526kk

hope fullt this helps i tried me guess

Pls delete and read the forum guidelines about not posting solutions. The OP has not posted any attempt.

Reply 7

davros

Original post by charfreemannn

anyone??????????????????

You need to post your thoughts first - as per forum guidelines. You can start from either side of the identity.

Original post by achieve526kk

hope fullt this helps i tried me guess

Please do not post full solutions - especially when the OP has made no attempt at the question. This is against forum rules!

Reply 8

charfreemannn

Original post by davros

You need to post your thoughts first - as per forum guidelines. You can start from either side of the identity.

Please do not post full solutions - especially when the OP has made no attempt at the question. This is against forum rules!

I obviously have attempted this question and struggled to find a solution, hence I posted it on this forum? I can't show you what I've done so far as I can't take photos on my laptop.

Original post by mqb2766

Pls delete and read the forum guidelines about not posting solutions. The OP has not posted any attempt.

Reply 9

mqb2766

Original post by charfreemannn

I obviously have attempted this question and struggled to find a solution, hence I posted it on this forum? I can't show you what I've done so far as I can't take photos on my laptop.

https://www.thestudentroom.co.uk/showthread.php?t=4919248
You could describe what you'd tried, what you had difficulties with, ...
That way its possible to offer hints about what you've tried.

(edited 2 years ago)

Reply 10

charfreemannn

Original post by mqb2766

https://www.thestudentroom.co.uk/showthread.php?t=4919248
You could describe what you'd tried, what you had difficulties with, ...
That way its possible to offer hints about what you've tried.

I have. Want to offer any help now?

Reply 11

mqb2766

Original post by charfreemannn

I have. Want to offer any help now?

What identities have you tried / why didnt they work / ...

Reply 12

charfreemannn

Original post by mqb2766

What identities have you tried / why didnt they work / ...

tried 1/cos and sin/cos but i don't know what to do with the 2^a bit since i've never come across a trig question with powers before

Reply 13

mqb2766

Its a typo in the question. The left hand side should be
sec(2A) + tan(2A)

Reply 14

Buddy324

1/cos 2A = sec 2A
sin 2A/ cos 2A = tan 2A.

(edited 2 years ago)

Reply 15

davros

Original post by charfreemannn

I obviously have attempted this question and struggled to find a solution, hence I posted it on this forum? I can't show you what I've done so far as I can't take photos on my laptop.

As above, you can type what you've tried, using brackets to make things clear if necessary. You should also note that the question doesn't make sense as written with those "powers" - it should be sec(2A) and tan(2A) as noted buy other posters.. You can now put the LHS over a common denominator and use some well-known identities :smile: