AS trig

Watch
#1
Prove the identity sin(x − 30◦ ) cos(x − 60◦ ) ≡ (√ 3)sin x. [3] (ii) Hence solve the equation sin(x − 30◦ ) cos(x − 60◦ ) = 1 2 sec x, for 0◦ < x < 360Can anyone help me with the second part to the question. I am a little stuck
0
3 years ago
#2
Have you tried plugging in to the equation for the second part? That should clear the way a bit?
0
#3
(Original post by Geodesic)
Have you tried plugging in to the equation for the second part? That should clear the way a bit?
Yup done that and I still can't seem to get it to work
0
3 years ago
#4
(Original post by 2000E)
Yup done that and I still can't seem to get it to work
Alright well after doing that try to see if you can spot any easy trig identities you can use, but I think you are going to have to rearrange it a bit. So try to get the trig identities on the same side and the numbers on the other side and then see if you can spot an identity that works. Also, what is the coefficient of sec(x), is it 1.2?
0
X

new posts
Back
to top
Latest
My Feed

Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

See more of what you like onThe Student Room

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

Poll

Join the discussion

Who is winning Euro 2020

France (113)
27.43%
England (143)
34.71%
Belgium (32)
7.77%
Germany (41)
9.95%
Spain (10)
2.43%
Italy (34)
8.25%
Netherlands (14)
3.4%
Other (Tell us who) (25)
6.07%