Question

if cos 2 theta = 3 then the value of sin 2 theta =​

Answer 1

Answer:

$cos2 \alpha \: can \: not \: be \: 3$

Step-by-step explanation:

$\sin(2 \alpha ) = \sqrt{1 - \cos {}^{2} (2 \alpha ) } = \sqrt{1 - 3 { }^{2} } = \sqrt{ - 8 }which \: is \: not \: real$