Hello to all i am new to this thread and i have a precalculus exam tomorrow. I was going to post 4 or 5 example problems that i have and wanted to know if someone could explain to me how to get the answer step by step. I need to use these explanations as a help guide and as long as its step by step i can understand them better. thank you very much in advance for those who can help me. i need some help with these type of problems it deals with angles im lost please could someone explain with as much detail as possible. 1.) in traingle ABC , B =65(degrees) C=45(degrees) and c = 12 what is the measure of side b?(two decimal places) 2.) in traingle ABC , B =90(degrees) C=30(degrees) and c = 15 what is the exact measure of side b? 3.) in traingle ABC , A =45(degrees) B=60(degrees) and a = 9 .side b to the nearest hundredth? 4.) in traingle ABC , a =10 b=20 and c = 13 what is the measure of side B to the nearest 10th degree?