CPhill

Very impressive, Alan....!!!

Complementary angles sum to 90°

So we have

(3x - 10) + (2x + 10)  = 90    simplify

5x  = 90    divide by 5 on each side

x = 18

Post your question and we'll see what we can do.....

Dividing by 0 is undefined.....constant, or not.....

Thanks for that resource, DS......come back......we miss you....!!!

20x30x50x70x90x110x130 = 2,702,700,000,000

2,3 5, 7, 11, 13 are all factors.....but the next smallest prime that isn't a factor is 17

We are looking for the secant of an angle whose tangent = 2x  = 2x / 1

So, r = √(4x^2 + 1)

So, the secant = r / x =  ± √(4x^2 + 1) .....remember, that "x" could be positive or negative 1 since the tangent is positive.....

Very nice, saseflower.....

I'm assuming this is (2/3)n+8<(29/6)n    multiply both sides by 6 to clear the fractions

4n + 48 < 29       subtract 48 from both sides

4n < -19             divide both sides by 4

n < -19/4