Calculate the temperature at which °c=°f

The relation between °C and °F is

°F=

5

9

(°C)+32

when °F=°C

∴°C=

5

9

°C+32

∴°C−

5

9

°C=32

∴−

5

4

°C=32

∴°C=−40°C

∴T=−40℃

∴ At −40℃, both the celcius and Fahrenheit scales show the same reading.

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

it means there are 3 atoms of oxygen