# URGENT as maths help needed

Announcements
#1
Does anyone know how to answer this?

Show that 1/cosθ + tanθ = cosθ/1-sinθ

I have got as far as changing tanθ into sinθ/cosθ but not sure what to do from here.
0
1 month ago
#2
If you've changed tan(theta) into sin/cos then you should see that the left hand side can be added together due to the common denominator.

Now you need to figure out how to change it into the correct form,
if you notice the cos on the bottom moves to the top, which to me would suggest you can make the top have a cos^2 in it. you could use the fact that cos^2+sin^2=1 and multiply both top and bottom by the same thing to get the cos^2 you want.
0
1 month ago
#3
(Original post by _martha)
Does anyone know how to answer this?

Show that 1/cosθ + tanθ = cosθ/1-sinθ

I have got as far as changing tanθ into sinθ/cosθ but not sure what to do from here.
ok so it is 1+sinΘ/cos Θ on the left.. multiply numerator and denominator with 1-sinΘ .. ull get cos2Θ/cos Θ(1-sinΘ) ... common factors remove .. then ull get the right hand side yea
0
1 month ago
#4
(Original post by Natsudragon)
ok so it is 1+sinΘ/cos Θ on the left.. multiply numerator and denominator with 1-sinΘ .. ull get cos2Θ/cos Θ(1-sinΘ) ... common factors remove .. then ull get the right hand side yea
It's best to give the op hints and let them figure it out rather than telling them how to do it from the get go.
0
1 month ago
#5
(Original post by Skiwi)
It's best to give the op hints and let them figure it out rather than telling them how to do it from the get go.
ohhh yeaaa .. ill do that next time .. thnx
0
#6
(Original post by Natsudragon)
ok so it is 1+sinΘ/cos Θ on the left.. multiply numerator and denominator with 1-sinΘ .. ull get cos2Θ/cos Θ(1-sinΘ) ... common factors remove .. then ull get the right hand side yea
thank youuu
0
1 month ago
#7
Heheee
(Original post by _martha)
thank youuu
0
X

new posts
Back
to top
Latest

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### Poll

Join the discussion

#### Do you know what you'll do if you don't get the grades you're hoping for?

Find something else in clearing (42)
28.77%
Take a gap year (23)
15.75%
Resit my exams (40)
27.4%
Look for alternate pathways to the career I want (19)
13.01%
I don't know yet (16)
10.96%
Something else (tell us in the thread) (6)
4.11%