I have a graphic calculator (TI-83 plus) and just recently, I found out that the sin button doesn't work. You could press it and all, but it doesn't give the correct answer. For example; 1sin(90) should equal to 1, but I get 0.8939966636. I tried reseting the memory, but it still doesn't work. Please help me, I'm going to have a test, and I need it to work!!!
2007-11-21 09:15:18 · 8 answers · asked by mikey_dude2 2 in Science & Mathematics ➔ Mathematics
Sounds like you are in Radians rather than Degrees.
As a test, try putting in Sin(π / 2) and you'll get 1.
Go to the menu and change your mode from 'Rad' to 'Deg' and you should get the right answers again.
2007-11-21 09:18:19 · answer #1 · answered by Puzzling 7 · 2⤊ 0⤋
Are you happy with calculating the cube of a number on your calculator? like 2^3=8, 3^3=27, 4^3=64, 5^3=125 ? you don't have a cube key as such, you need to use the power key. (on my calc its yx with the y written as superscript above the x) so to calc 2^3 i type 2 [the yx key] 3 = and the answer pops out 8. well the cube root is the same as powering with the value of 1/3. try 125 [the yx key] 0.3333333 = and the answer should be 5 or very close. how to put the exact value of 1/3 into the calculator? you could use brackets like so: 125 [the yx key] ( 1 / 3 ) = If you are fortunate your calculator will have the nth root key on mine it is a x√ y then all you need do is type 125 [ the x√ y key] 3 =
2016-05-24 22:34:59 · answer #2 · answered by ? 3 · 0⤊ 0⤋
check if you have radian mode or degree mode on. 90 degree is not the same as 90 radians. the conversion formula is
X degree = (x * PI) / 180 radians
2007-11-21 09:19:40 · answer #3 · answered by Anonymous · 1⤊ 0⤋
it does work correctly, your calculator is in rad mode, you have to changed it to degree mode to get sin(90)=1.
2007-11-21 09:19:02 · answer #4 · answered by norman 7 · 1⤊ 0⤋
Your calculator is in radians mode. Change it to degrees mode.
2007-11-21 09:18:18 · answer #5 · answered by gudspeling 7 · 1⤊ 0⤋
It is the mode.
Under the mode menu, set "Rad" to "Deg."
2007-11-21 09:18:29 · answer #6 · answered by ♣ K-Dub ♣ 6 · 1⤊ 0⤋
ask a silly question and echo loudly to the world
don't worry everyone does it at least once :-)
2007-11-21 09:27:58 · answer #7 · answered by Anonymous · 0⤊ 0⤋
eather get a new caculater or try reversing the numbers. here to help
-icy
2007-11-21 09:23:45 · answer #8 · answered by Anonymous · 0⤊ 3⤋