Question

2 cos 3x-1=0
Solve for x​

Answer 1

Answer:

x=91/3

Step-by-step explanation:

2 cos 3x-1=0

cos 3x-1= 0

Also, Cos 90 = 0

Therefore, 90=3x-1

3x=91

x=91/3

Answer 2

Answer:

2cos3x-1=0

Step-by-step explanation:

2cos3x=1

cos3x=1/2

cos3x=cos 60°

=>3x=60°

=>x=60°/3

=>x=20°

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