Show Only If - In Equation Editor

[DroopyPawn]

Does the "Show Only If" in the Equation Editor actually work?

I tried to create a dynamic question that asks for either sin, cos, or tan of a given angle. The randomly created angle would always have a reference angle of 30, 45, or 60. Now for my solutions, I tried sqrt(3) over 2 for all angles with reference angle of 30 degrees. And I added Show Only If r=2 and a1=30. r=2 makes it a cos question and 30 is the measure of the reference angle (the actual angle in the question may be 150, 210 or even 330.

I added a variable as a leading coefficient to make the answer either positive or negative as needed. This all works fine except that the answer is ALWAYS shown, even when it's not a cos question or even if it's not a 30 reference angle question.

Any suggestions on how to hide this answer when it's not needed?

[MathTeacher1]

My understanding is that the "only if" statements do not work on conditional statements. It only works for true/false. So "display if a" would show if a was true or 1, but "display if a=30" does not work.

[Support DC]

Could you email me your question bank containing just that one question? Email it to betty_kamstra@fscreations.com.

[lburns]

I read your post, and I would also like to know a bit more about angles in ExamView. Do you have an example of a dynamic question that works for the SOHCAHTOA rules?

[Support DC]

You are correct that the Equation Editor "Display only if..." works only for values of 0 (false) or 1 (true). The Cartesian graph will let you input statements that the software will determine are true or false. See attached bank for an example of using the "Display only if..." feature in the Equation Editor.

Attached File ( Number of downloads: 2255 )
 Display_only_if_in_EE.bnk

[Support DC]

For Lburns, here is a bank that uses the sine function.

Attached File ( Number of downloads: 2164 )
 Sine_Function.bnk