M
mojito417
Guest
I dont understand the awnser to the question,
Its in my notes, and it doesnt make any sence to me.
I get a completely different awnser, can anyone explain this equation to me and how they got that awnser?
a^2=b^2+c^2 - 2bc CosA
a^2= (16)^2 + (11)^2 - (2)(11)(16)cos118
a^2= 542.25
a^2= Square root of 542.25
= 23.3
I dont understand how 11 squared +16 squared already equals less then what they got, and i havn't subtracted the 2bc cos yet.
I know its confusing but if you could help thatd be amazing.
Thankyou.
Its in my notes, and it doesnt make any sence to me.
I get a completely different awnser, can anyone explain this equation to me and how they got that awnser?
a^2=b^2+c^2 - 2bc CosA
a^2= (16)^2 + (11)^2 - (2)(11)(16)cos118
a^2= 542.25
a^2= Square root of 542.25
= 23.3
I dont understand how 11 squared +16 squared already equals less then what they got, and i havn't subtracted the 2bc cos yet.
I know its confusing but if you could help thatd be amazing.
Thankyou.