Question

Cos(3x)=Sqaure roote 2 / 2

Answer 1

`\huge\rightarrow{{ \underline{ Answer \: \: ✓ }}}`

`\huge\boxed{x = 15°}`

Solution :

• 
  `\cos(3x) = ( √(2) )/(2)`

• 
  `\cos(3x) = (1)/( √(2) )`

• 
  `\cos(3x) = \cos(45)`

• 
  `3x = 45`

• 
  `x = 15`

The measure of x = 15°

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