Question

cos(3x)=Sqaure roote 2 / 2

Answer 1

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

$\huge\boxed{x = 15°}$

Solution :

• $\cos(3x) = \dfrac{ \sqrt{2} }{2}$

• $\cos(3x) = \dfrac{1}{ \sqrt{2} }$

• $\cos(3x) = \cos(45)$

• $3x = 45$

• $x = 15$

The measure of x = 15°

$\#TeeNForeveR$