What is the value of sec $\frac{-2π}{3}$ ?
1). -2
2). 2
3). $\frac{2}{√3}$
4). $\frac{-2}{√3}$
2. If 2ycos θ = x sin θ and 2xsec θ – y cosec θ = 3, then the value of x2 + 4y2 is
5. $\frac{1}{secA+tanA}$ is equal to
6. What is the simplified value of $1 + tanA tan\left(\frac{A}{2}\right)$?
7. if sin 31=$\frac{x}{y}$, the value of sec31-sin59 is
9. If $5 sec \theta - 3 tan \theta$ = 5, then what is the value of $5 tan \theta - 3 sec \theta$?