Question

Which of the following is correct??
A tantheta=delta l/l
B tantheta =l/deltal
C costheta =delta l/l
D sintheta =delta l/l

Very hard question
Pls tell the answer​

Answer 1

C costheta=delta l/l

(C) is the correct AnSwEr

Answer 2

Answer:

A is the right answer that I now