Me, i've been trying for days and i can't get it right. if any of your were as to be as kind-hearted as to me complete this task, i will be ever so grateful. you for your time in others, i seriously appreciate it.

10.sinB=b/c

A+B=90

cosA=b/c

cosB=a/c

a^2+b^2=1

tgA=a/b

tgB=b/a

11.d

12.sin30=1/2

cos30=2^(1/2)÷2=radical2÷2

cos45=sin45. ,tg45=1

tg30=1÷(3)^(1/2)=(3)^(1/2)÷3

13.B

please say praier for me to God to pass my exam good and get good rank.thanks.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)