Answer:
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°) = [tex]\frac{1}{cos120}[/tex]
so from equation 2
= [tex]\frac{1}{cos120}[/tex] cos(120°)
= 1
so sec(120°)cos(120°) = 1
