Question

A triangle has an area of 15 in2, and two of the sides of the triangle have lengths 5 in. and 7 in. Find the angle included by these two sides. (Assume the angle is acute. Round your answer to one decimal place.)

Answer 1

15 = A = (1/2)(5)(7)Sin Theta

Sin Theta = (2)(15)/ (5)(7) = 30/35 = 6/7

How do I get degrees?

Answer 2

in your calculator,theres somewhere \[\sin ^{-1}\] ,just type \[\sin ^{-1}\](6/7) to get your answer

Answer 3

Oh... Thanks! I forgot to use the inverse.

Answer 4

I got 59 degrees btw

Answer 5

yes