UGC NET CSE | June 2016 | Part 3 | Question: 14

Question

A point P(5,1) is rotated by 90$^o$ about a pivot point (2,2). What is the coordinate of new transformed point P'?

• A. (3,5)
• B. (5,3)
• C. (2,4)
• D. (1,5)

Answer 1

ans is A

Comments

Very gd

Answer 2

Translation  (5-2,1-2) = (3,-1)

Rotation

x'=xcos90-ysin90

 =3.0+1

 = 1

y'=ycos90-xsin90

 =0+3

 =3

Translation (1+2,3+2)= (3,5)

So option a is correct

Comments

Great yaar wat a short answer... thanks alot... if u hv more solutions like these questions so pls share....