Simplify the equation using addition or subtraction formula.
sin θ cos 3θ + cos θ sin 3θ = 0

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.