Question

3cos2(x)+2sin(x)+1=0 find all the values of x. a metal will be given

Answer 1

replace \(3\cos^2(x)\) by \(3(1-\sin^2(x))\) and then you will have a quadratic equation in \(\sin(x)\)

Answer 2

its not cos^2 its cos2

Answer 3

\[3\cos 2(x)+2\sin(x)+1=0\]