radomes.openskiesproject.org
Neal3Maring
Neal3Maring Neal3Maring
  • 05-07-2016
  • Mathematics
Answered

The image of a point after a –90° rotation about the origin is (–4, 7). What are the coordinates of the preimage?.

Verified Answer :

andriansp andriansp
  • 10-07-2016

The coordinated of the preimage would be :

x  = x cos θ + y sin θ

y = x sin θ + y cos θ

where 

x = -4  
y = 7
θ = -90

hope this helps

Answer Link

Related Questions

The following is an example of what type of sequence 3 11 19 27 35 ageometric cratio barithmetic ddifference
Lena is writing a research paper on genetically modified foods Which of the following is a brainstorming technique she can use to narrow down the topic A read a
The points $A(1,3)$, $B(7,1)$, and $C(-3,-9)$ are joined to form a triangle. It can be shown that $ABC$ is right-angled with the right-angle at $A$. The poi
Which explains what is foreshadowed by the reawakening of the garden A new sense of belonging for Dickon A dramatic improvement in Colins health A return to Ind
What volume does 285 g of CO2 occupy at 648o C and 335 atm
is 1536 equivalent to 3020
Why is a protozoan considered animallike
The french were furious with the english because
a car speeds up from rest to 16 m s in 4s calculate the acceleration
how many ounces is 25 pounds of copper