      # Casio fx -991MS calculate derivative trigonometric problems

fx -991MS derivative trigonometric

3 replies to this topic

### #1 praneethpj

praneethpj

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Casino fx-991MS

Posted 09 December 2017 - 10:54 AM

I want to calculate y=sin(x^2+1) from my Casio fx -991MS. but I couldn't , I searched so many time on the internet and that is explained without trigonometric problems. please give me a solution.

thanks

### #2 anon34

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Posted 09 December 2017 - 11:13 AM

What do you want to do? What problems are you facing? Explains your problems clearly.

If you are intending to get 2 x cos(x^2+1) , you can't, because Casio 991MS doesn't support symbolic manipulation. You need a better calculator.

However, it can calculate the derivative numerically.

For example, enter (remember to use radian mode!)

```d/dx(2 × X × cos (x²+1), 5)
```

will calculate the derivative of the function at

```x=5
```

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### #3 praneethpj

praneethpj

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Posted 09 December 2017 - 11:31 AM

What do you want to do? What problems are you facing? Explains your problems clearly.

If you are intending to get 2 x cos(x^2+1) , you can't, because Casio 991MS doesn't support symbolic manipulation. You need a better calculator.

However, it can calculate the derivative numerically.

For example, enter (remember to use radian mode!)

```d/dx(2 × X × cos (x²+1), 5)
```

will calculate the derivative of the function at

```x=5
```

I want to calculate derivative trigometric functions,

ex y=tan5x

is it possible to perform this type of calculation using casio fx-991ms?.

### #4 anon34

anon34

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Posted 09 December 2017 - 03:26 PM

Let me say again:

For that example y(x) = tan(5 x) ,

You cannot get y'(x) = 5 sec² (5x). (evaluate symbolically)

You can get that y'(5) = 5.08914..., y'(6) = 210.1413387..., etc. (evaluate numerically at some points)

Edited by user202729, 09 December 2017 - 03:27 PM.

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### Also tagged with one or more of these keywords: fx -991MS, derivative, trigonometric

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