Question Text
Question 4 :
<br/>For how many values of x between $0$ and $2\pi $ is the equation $2\csc 2x \cot x-{ \cot }^{ 2 }x=1$ valid ?
Question 6 :
A wheel makes 12 revolutions per hour The radians it turns through in 20 minutes is:<br/>
Question 8 :
If ${ x }_{ 1 }=3sin\omega t$ and ${ x }_{ 2 }=4cos\omega t$ then
Question 9 :
If $\dfrac {\sin x}{\sin y}=\dfrac {1}{2},\dfrac {\cos x}{\cos y}=\dfrac {3}{2}$, where $x, y\in \left(0, \dfrac {\pi}{2} \right)$, then the value of $\tan (x+y)$ is equal to:
