find angle a using cosine rule A=? B=37.3 C=60.2 a= 8.16 b=4.99 c=7.14 when inverting cos 1.1 I keep getting error on calculators please explain
Thanks omi67
Hayley, only your first formula is accurate. Can you see what is wrong with the others?
Well, Your equations are:
a^2=b^2 + c^2 -2bc * Cos(A)
B^2= B^2 + C^2 - 2bc * Cos(B)
C^2= B^2 + C^2 - 2bc * Cos(C)
So, Redo it, use the formula's above, then please tell me what you get. :)
Hallo guest
