This one comes from my module without proper explanation.Please suggest how to approach this problem ?
PS:How do you write degree (in symbol) in math-mode ?
This one comes from my module without proper explanation.Please suggest how to approach this problem ?
PS:How do you write degree (in symbol) in math-mode ?
As Djaian pointed out use the fact that $$\sin\angle{R} = \frac{PQ}{PR}=\frac{PQ}{2PQ}=\frac{1}{2}$$ So $\angle{R} = ?$
Also i hope you are aware of the fact that in a right angled triangle $$\sin\theta =\frac{\text{Opposite Side}}{\text{Hypotenuse}}$$