My Notes Ask Your Teacher 4 1 points SPreCalc7 66022M Find t

My Notes Ask Your Teacher 4. -/1 points SPreCalc7 6.6.022.M Find the indicated side x. (Use either the Law of Sines or the Law of Cosines, as appropriate. Assume b = 12 and c = 21, Round your answer to one decimal place.) 40°

Solution

Using law of cosines

x²=b²+c²-2bc cos A

x²=144+441-504 cos 40

x=14.10367 = 14.1

And that\'s the answer .