Question

Help with 7 and 8 and explain

Answer 1

Answer:

7.  $44^{\circ}$

8.

Step-by-step explanation:

7. Using Cosine Rule

$a^2=c^2 +c^2+bcCos(a)$

=>$a^2=20^2+15^2-2*20*15Cos(68^o)$

   $a^2=400.24$

   $a=20.00$

=>Using Sine Rule

    $20/Sin 68^o=15/sinB$

      $ABC=44^o$

8