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# Need Help with Maths - Trig Watch

1. I am stuck on this question
1-(sinθ tanθ )/(1+secθ )≡cosθ

Help would be much appreciated
2. (Original post by achu2k11)
I am stuck on this question
1-(sinθ tanθ )/(1+secθ )≡cosθ

Help would be much appreciated
What have you tried?
Spoiler:
Show
First write tan in terms of sin and cos, and sec as 1/cos it should make things more obvious
3. (Original post by TenOfThem)
I assume that you are trying to prove the identity

Multiply out the brackets and see what happens
Isn't it a fraction?
4. (Original post by joostan)
Isn't it a fraction?
oh yeah

missed the /

eyesight is not what it used to be
5. (Original post by achu2k11)
I am stuck on this question
1-(sinθ tanθ )/(1+secθ )≡cosθ

Help would be much appreciated

Write all the parts using Sine and Cosine

Do you know how to get rid of a fraction in a fraction
6. i am still need help on it
7. (Original post by achu2k11)
i am still need help on it
So:

Spoiler:
Show
So what happens if you multiply the LHS by
?
8. (Original post by achu2k11)
i am still need help on it
Start by multiplying numerator and denominator of your fraction by

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