Question

If 2cos3B =1 .Then the valuue of B is​

Answer 1

Answer:

cos3B=1/2

cos3B=cos60

3B=60

B=20

Answer 2

$\huge\star\:\:{\orange{\underline{\purple{\mathcal{Answer}}}}}$

$\mathcal{\pink{\underbrace{\blue{Given :- }}}}$ 2cos 3B = 1

$\mathcal{\pink{\underbrace{\green{To Find :-}}}}$Value of B

$\mathcal{\pink{\underbrace{\orange{Solution :- }}}}$

2Cos 3B = 1

$\cos3b = \frac{1}{2}$

$= > \cos(60) = \frac{1}{2}$

$= > 3b = 60$

$= > b = \frac{60}{3}$

$= > b = 20$

$\boxed {Value of B = 20}$