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Home / Aptitude Tests / Further Mathematics / Solve: \(2\cos x - 1...
Solve: 2cosx1=0...

Solve: 2cosx1=0

A.

(2π3,4π3)

B.

(π6,5π6)

C.

(π5,2π5)

D.

(π3,5π3)

Correct answer is D

2cosx1=02cosx=1

cosx=12

x=cos1(12)

= π3 = 5π3