In triangle ABC , AB=9cm, BC=6cm and CA=8cm.
AB=9cm, BC=6cm and CA=8cm.

Find in degrees to the nearest 0.1°,
the size of ∠BAC.

(TR said hint is cos rule) PLS HELP ONLY GOT A FEW MINS TIL DUE

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,