I can answer qs on maths or physics

Sup dudes and dudettes, I'm free for the next couple of hours so if you are stuck on any maths or physics questions/topic then hmu. I am currently doing physics at Cambridge and will try my best to help :smile:

Reply 1

kkboyk

21

Original post by Darth_Narwhale

Sup dudes and dudettes, I'm free for the next couple of hours so if you are stuck on any maths or physics questions/topic then hmu. I am currently doing physics at Cambridge and will try my best to help :smile:

If you want to help, just go around and answering unanswered threads. No-one will bother with a thread like this.

Reply 2

ellie12344

1

Original post by Darth_Narwhale

Sup dudes and dudettes, I'm free for the next couple of hours so if you are stuck on any maths or physics questions/topic then hmu. I am currently doing physics at Cambridge and will try my best to help :smile:

Please could you help me with this trig question?

solve for 0 < x < 360 degrees

2sin(x) = cos(x+60)

This is what i've got so far....

cos(x+60) = cosx cos60 - sinx sin60

i just can't see where i have to go with it next....

Thanks :-)

Reply 3

Darth_Narwhale

OP

8

Original post by ellie12344

Please could you help me with this trig question?

solve for 0 < x < 360 degrees

2sin(x) = cos(x+60)

This is what i've got so far....

cos(x+60) = cosx cos60 - sinx sin60

i just can't see where i have to go with it next....

Thanks :-)

You know what cos (60) and sin(60) are, so you are left with an expression of sin(x) and cos(x). Get all the sin(x) terms on one side of the = and the cos(x) terms on the other side. Then divide by cos(x) to get something along the lines of tan(x) = ...

Then just type it into the calculator. I got 9.9 and 189.9 but I may have made a mistake somewhere :smile:

Reply 4

Pikachū

2

Unparseable latex formula:

[br] [br]\int_{0}^{2\pi}\!\!\int_{0}^{\infty} e^{-r^2}r\,dr\,d\theta = \pi \[br] [br]

Reply 5

ellie12344

1

Original post by Darth_Narwhale

You know what cos (60) and sin(60) are, so you are left with an expression of sin(x) and cos(x). Get all the sin(x) terms on one side of the = and the cos(x) terms on the other side. Then divide by cos(x) to get something along the lines of tan(x) = ...

Then just type it into the calculator. I got 9.9 and 189.9 but I may have made a mistake somewhere :smile:

Thank you very much!!!!