Carmella filled her swimming pool. Before she started to fill it, there was already some water inside the pool. The water entered the pool at the same amount each hour.

sec(120°)cos(120°) = 1

Step-by-step explanation:

given data

theta = 120

to find out

sec(theta°)cos(theta°)

solution

we have given equation

sec(theta°)cos(theta°)     ......................1

put here value of theta in equation 1

= sec(120°)cos(120°)    ..............2

we know sec(120°) =

so from equation 2

= cos(120°)

= 1

so sec(120°)cos(120°) = 1