we are given
Area is 1.89
[tex] A=40 [/tex]
[tex] b=2.8 [/tex]
now, we can use area formula
[tex] A=\frac{1}{2} c*b*sin(A) [/tex]
[tex] 1.89=\frac{1}{2} *c*2.8*sin(40) [/tex]
now, we can solve for c
we will get
[tex] c=2.10023 [/tex].............Answer
