How do you simplify the expression `costhetasectheta-costheta/sectheta`?

Related questions

• How do you use the fundamental trigonometric identities to determine the simplified form of the...
• How do you apply the fundamental identities to values of `theta` and show that they are true?
• How do you use the fundamental identities to prove other identities?
• What are even and odd functions?
• Is sine, cosine, tangent functions odd or even?
• How do you simplify `sec xcos (frac{\pi}{2} - x )`?
• If `csc z = \frac{17}{8}` and `cos z= - \frac{15}{17}`, then how do you find `cot z`?
• How do you simplify `\frac{\sin^4 \theta - \cos^4 \theta}{\sin^2 \theta - \cos^2 \theta}` using...
• How do you prove that tangent is an odd function?
• How do you prove that `sec(pi/3)tan(pi/3)=2sqrt(3)`?