Find x if cos x = $-\frac{1}{2}$
Answer & explanation
Correct answer: option 2
cos x = - \(\frac{1 }{2}\)
We know, cos 60º = \(\frac{1 }{2}\)
and 60º = \(\frac{π}{3}\)
but in question cosx is negative . So,
x = π - \(\frac{π}{3}\)
= \(\frac{2π}{3}\)
Find x if cos x = $-\frac{1}{2}$
Correct answer: option 2
cos x = - \(\frac{1 }{2}\)
We know, cos 60º = \(\frac{1 }{2}\)
and 60º = \(\frac{π}{3}\)
but in question cosx is negative . So,
x = π - \(\frac{π}{3}\)
= \(\frac{2π}{3}\)