Find the smallest angle of triangle s in PQR whose sides are given as follows. Give your answers to 3 significant figures..when p=5.6cm, q =4.6cm, r=6.5cm

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!