What is the radian value of arccos(-3/sqrt(2))?

Not defined over the real numbers

Step-by-step explanation:

Let

This implies that:

This implies that:

The range of the cosine function is -1≤y≤1

Therefore

is not defined for over the real numbers.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

4400

step-by-step explanation: