8. Solve each of the following trigonometric equations and find all solutions in the interval
b. sin x + sqrt2 = -sin x
c. 3tan^2 x - 1 = 0
d. 2cos(3x - 1) = 0
f. 2sin^2 x - x - 1 = 0
b)
\( sin x + \sqrt2 = -sin x\\ 2sinx=-\sqrt2\\ sinx=-\frac{\sqrt2}{2}\\ sinx=-\frac{1}{\sqrt2}\qquad \text{3rd and 4th quads}\\ x=180+45,\;\;\;or\;\;\;360-45\\ x=225^\circ\;\;\;or\;\;\;315^\circ\\ \)
+123 
