How do you find the exact value of the third side given #triangle PQR#, #p=126, q=214, mangleR=42#?

Related questions

• Does the law of cosines work for any triangle?
• How do you derive the law of cosines?
• How is the law of cosines related to the pythagorean theorem?
• How do you find the angle in the law of cosines?
• How do you use the law of cosines to find the area of a triangle?
• What is the law of cosines?
• When can the law of cosines be used?
• How do you find angles A, B, and C if in triangle ABC, #a=12#, #b=15#, and #c=20#?
• How do you find the measure of the smallest in an acute triangle whose side lengths are 4m, 7m, and 8m?
• Bong walks 100 m due North and then 150 m in a direction N 37 deg. E. How far is Bong from his...