Find x if cosx = 
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e 2π/3
⇒ Cosx = -1 / 2
⇒ Cosx = -Cos(π / 3)
⇒ Cosx = Cos(π - π / 3)
⇒ Cosx = Cos(2π / 3)
⇒ x = 2π / 3
SSC CHSL 2020 PYQ — Question 64
SSC CHSL - 14th October 2020 - Shift 3 • Quantitative Aptitude • Q64