Is this unsolvable? ​

Every problem has a solution .Lets solve it .

Here given that

Use cross multiplication

Now

As its a triangle

Put y=5x

We need not to find y

See the marked angle and x are supplementary angles hence there sum will be 180

The required angle is 165°.

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.