Question

what do u mean by these signs

Answer 1

HEY MATE!

YOUR ANSWER...

These are Greek alphabets which are also used in science (physics)

$\alpha \: - alpha$

$\beta - \: beta$

and the third one is Delta.

HOPE IT HELPS!

Answer 2

Hola mate !!


$<big><b>Theses are Greek alphabets which are mathematically used signs in Physics .</big></b>$

$\alpha \: \: is \: \: called \: as \: alpha$


$\beta \: \: is \: \: called \: as \: beta$


ð is called as delta .


They are used as $<b>coefficients in Thermal expansion of solids and liquids .</b>$

ALPHA is the coefficient of Linear expansion .

BETA is the coefficient of Superficial expansion .

DELTA is used for showing Heat Transfer .


$<big><b>HOPE HELPS !!</big></b>$