Question about Texas Instruments TI-89 Calculator

# Ti-89 titanium SIN!!!!!

When i type in sin(75)*16 my answer should be 15.45 but instead i get something else like 4 (square root of 3 + 1)*square root of 2. Im going crazy dont know whats wrong, it also does it for cosine and tangent!!!!!!!!!

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The answer that you have received in actuality is correct. However, it is in exact form when the answer that you were looking for was an approximation (decimal form) answer. To achieve this all you have to do is hit the alpha button (the yellow button with a diamond in the center) and then enter which will give you your desired answer :-)

Posted on Jan 15, 2008

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• Texas Instru... Master

Go to the Home screen. Press the MODE key. Scroll through the configuration options. Look for the line Exact/Approximate and change the setting to approximate. Also make sure you angle unit is set to degree.

Posted on Jan 31, 2013

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Posted on Jan 02, 2017

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Hello,
Clear all variables [F6] [ENTER]
Here is a screen capture of the display for your integral.

Hope it helps

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### Solve it plz......

cos x + root 3 sin x =root 2
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(cos x + ö3 * Sin x)2 = (ö2)2
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Cos2 x + Sin2 x + 2 * Sin2 x = 2
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(
sin
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