I need help! please I will medal

If there is a triangle and its b side has a size of 56.8 cm its C has a angle of 90 and Its B angle is 42° how do I find its a size?

I did this formula..
I know its possible to do it with A.. but with B is right too?

cos (42)= 56.8/c ??? HELP

Question

I need help! please I will medal

If there is a triangle and  its b side has a size of 56.8 cm  its C has a angle of 90 and Its B angle is  42°  how do I find its a size?  

I did this formula..
I know its possible to do it with A.. but with B is right too?

cos (42)= 56.8/c ??? HELP

anonymous · Answer

i forgot :P 7th grade does not require this

anonymous · Answer

What do you mean? I'm not 7 grader... lol

anonymous · Answer

ya but this was a thing of the past

anonymous · Answer

for me

anonymous · Answer

o really...