I'm doing some work on trigonometriy but I can't do sin y on my calc, its just sin and when I do sin y = 8/12 on this websites calculator it doesn't show anything! So may I ask how an I supposed to do this?



 May 2, 2020

No prob, TacoBell


We just need to  realize  how to find angle  x


However.....we  don't need the sine here.......the sine is the opposite / hypotenuse


But we  actually have    opp / adj   =  tangent


So  we need


tan x   =  8/12    to  find  this angle we need to  take the arctangent   [ also called the inverse tangent]


I don't know how it might be noted on your calculator......most  use  tan-1


[ Make sure your calculator is in degree mode  !!!]


So  we have


tan -1  ( 8/12)  =  x


33.69°   =  x    =    33.7° [ to one decimal place ]


Remember that to find an angle, we need to use the inverse functions  ]


Let me know if you have any problems here



cool cool cool 

 May 2, 2020
edited by CPhill  May 2, 2020

In order to get the web2.0calc calculator to solve sin y = 8/12 you have to type sin(y) = 8/12 and then press enter (note the brackets around y). This is the outcome:


 May 2, 2020

Just looked at the question, and of course, it should be tan(y) = 8/12.  However, the same principle applies.

Alan  May 2, 2020
edited by Alan  May 2, 2020

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