What is the value of sin $\frac{5π}{3}$?
1). $\frac{√3}{2}$
2). $\frac{2}{√3}$
3). $\frac{1}{√3}$
4). $\frac{-2}{√3}$
2. If $sec (3x - 20^{0})$ = $cosec (3y + 20^{0})$, then what is the value of tan (x + y)?
4. A train 240 meters in length crosses a telegraph post in 16 seconds. The speed of the train is?
5. If asin θ +bcos θ = c then the value of acos θ – bsin θ is :