Fill in the blanks:
General equation of first degree in x and y always represents a __________

Fill in the blanks: The equation of normal to the curve y = tan x at (0,0) is ____________________.

Fill in the blanks: A zero vector is represented by _____.

Fill in the Blank: Perfect gas equation for one mole is = ____.

Fill in the blanks: the differentiate equation of y=c.sinx is ________.

Fill in the blanks: longer line in the symbol for a cell represents its __________ terminal.

Fill in the blank: Integrating factor of xdy/(dx)+2y=3x is

Fill in the blanks- Nitrolim was first synthesized by two scientists named ___________________ and ___________________.