Question

True or false The value 3pi/2 is a solution for the equation 2sin^2x -sin x -1=0

Answer 1

Answer:

False

Step-by-step explanation:

The given equation is:

$2sin^2x-sinx-1$

Substituting x=$\frac{3\pi}{2}$ in the above given equation, we have

=$2sin(\frac{3\pi}{2})^2-sin(\frac{3\pi}{2})-1$

=$2(-1)^2-(-1)-1$

=$2+1-1$

=$2$

Thus, the value of the given equation by substituting the value of x is equal to 2 and not zero, therefore the given statement is false.

Answer 2

The answer is False. Have a wonderful afternoon