please explain 5sinx+5=0

Question

i came across this problem studying level 5 mathematics and was unsure how to solve it please help

Answer 1

please explain 5sinx+5=0
i came across this problem studying
level 5 mathematics and was unsure
how to solve it please help

It is solved the way any algebra problem
is solved. Add, subtract, multiply and divide
as necessary to get the x term alone on the
left side of the equation.

5 sinx  + 5 = 0
5 sinx + 5 - 5 = 0 - 5
5 sinx = -5
(5 sinx) / 5 = -5 / 5
sin x = -1

At this point, we don't have x, we have
the sine of x. By using the inverse sin
function, we can find what x is.

x = arcsine -1
x = 90 degrees

Comments

Another correction needed.
x = arcsine -1 gives
x = -90 degrees.
That's equivalent to 270 degrees, which, when graphed,
extends DOWN along the y axis.