why is tan undefined at 90?
441427
As our first quadrant angle increases, the tangent will increase very rapidly. As we get closer to 90 degrees, this length will get incredibly large. At 90 degrees we must say that the tangent is undefined (und), because when you divide the leg opposite by the leg adjacent you cannot divide by zero.
716338
The natural domain of tan(x) is R - (2n+1)pi/2. The function is not defined at x=(2n+1)pi/2. ... For every other point(which just so happens to be the complete domain), the function is continuous. So, the function f(x) = tan(x) is continuous at all points in its natural domain.
1409570
Absorbance values greater than or equal to 1.0 are too high. If you are getting absorbance values of 1.0 or above, your solution is too concentrated. ... At an absorbance of 2 you are at 1%T, which means that 99% of available light is being blocked (absorbed) by the sample.
850327
zero slope (when lines are horizontal) undefined slope (when lines are vertical)
278672
In the Distributions menu, scroll down to “invT(“ and press Н. (This command only exists on the TI-84, not the TI-83.) The command syntax is “invT(area to the left of t, degrees of freedom)”. Make sure the area that you enter is the area to the left the t value you want to find.
307807
Apply the equation theta = tan–1(y/x) to find the angle: tan–1(–7.0/–5.0) = 54 degrees. However, note that the angle must really be between 180 degrees and 270 degrees because both vector components are negative.
97181
The slope of a vertical line does not exist! We can't divide by zero, which is of course why this slope value is "undefined". This relationship is always true: a vertical line will have no slope, and "the slope is undefined" or "the line has no slope" means that the line is vertical.
725242
The “X” coordinate, being the denominator, will yield an undefined answer despite the value of the numerator. It is a rule that anything decided by zero is an undefined value since nothing can be divided by zero. The line in the undefined slope doesn't move to the left or the right along the “Y” axis.
1008063
But actually in those points the function tan(x) is not defined and hence they are not in the domain of tan function. So, it is ok to say of course tan(x) is continuous in its domain.
209936
At x = 0 the function is undefined, because there is a zero denominator. If x is positive then going closer and closer to zero keeps f(x) at 1. But if x is negative, going closer and closer to zero keeps f(x) at −1. So this function does not have a limit at x = 0.
1460279
['function getRatio($num1, $num2){', 'for($i = $num2; $i > 1; $i--) {', 'if(($num1 % $i) == 0 && ($num2 % $i) == 0) {', '$num1 = $num1 / $i;', '$num2 = $num2 / $i;', "echo getRatio(2, 4), '<br>';", "echo getRatio(2, 10), '<br>';"]
1023174
The vertical asymptote is a place where the function is undefined and the limit of the function does not exist. This is because as 1 approaches the asymptote, even small shifts in the x -value lead to arbitrarily large fluctuations in the value of the function.
1316174
Type 'number | [number, number]' is not assignable to type 'number'. Type '[number, number]' is not assignable to type 'number'. This is because the output of the type you're assigning from is ambiguous (I'm using D3).
1009775
There is no number that you can multiply by 0 to get a non-zero number. There is NO solution, so any non-zero number divided by 0 is undefined.
790061
From geometry, Tanθ = opposite / adjacent. Tan * 42 degrees * 1 meter = adjacent = 2.3 meters radius. So our rainbow is 4.6 meters wide, and 2.3 meters tall!
1034823
Given that, we can easily find the sine and cosine: sin(270o)=−1,cos(270o)=0,tan(270o)=−10= undefined.
607454
The rules for doing that are defined by the specification: Basically, if the value is undefined , null , "" , 0 , or NaN , it coerces to false ; otherwise, it coerces to true . So ! undefined is true because undefined implicitly converts to false , and then ! negates it.