What are the first two steps for finding the magnitude of the resultant vector? a. find the square of the first horizontal vector and the square root of the first vertical vector b. find the square root of the first horizontal vector and the square root of the second horizontal vector c. find the sum of the two horizontal vectors and the sum of the two vertical vectors d. find the difference between the two horizontal vectors and the difference between the two vertical vectors

Option C is right.

Step-by-step explanation:

Resultant vector is the sum of two vectors.

i.e. addition of horizontal component and addition of vertical components.

For example, if ai+bj is one vector and ci+dj be another vector,

resultant vector = a+ib+c+id

= (a+c)+i(b+d)

i.e. option c is right

me

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.