A body is in equilibrium under the action of three coplanar forces P, Q and R are shown in the figure. Select the correct statement.

 

• A

  $\frac{\mathrm{P}}{\mathrm{sin\alpha }} = \frac{\mathrm{Q}}{\mathrm{sin\beta }} = \frac{\mathrm{R}}{\mathrm{sin\gamma }}$

• B

  $\frac{\mathrm{P}}{\mathrm{cos\alpha }} = \frac{\mathrm{Q}}{\mathrm{cos\beta }} = \frac{\mathrm{R}}{\mathrm{cos\gamma }}$

• C

  $\frac{\mathrm{P}}{\mathrm{tan\alpha }} = \frac{\mathrm{Q}}{\mathrm{tan\beta }} = \frac{\mathrm{R}}{\mathrm{tan\gamma }}$

• D

  $\frac{\mathrm{P}}{\mathrm{sin\beta }} = \frac{\mathrm{Q}}{\sin \mathrm{\gamma }} = \frac{\mathrm{R}}{\mathrm{sin\alpha }}$