Calculation Problem

My calculator is defekt, and I need to finish an assignment in trigonometry.
Does anyone know any good online calculator to use sin,cos and tan ?

Im currently using this one : eCalc - Online Scientific Calculator
seems like a good calculator, but I dont get the following:


I am looking at a sample:

Quote:

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Let x represent the hypotenuse, side AC.

sin = O/H
sin56=32/x
xsin56=32
x=32/sin56
x=38.6cm

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Dividing 32 by sin 56 using the above calculator gives me a totally different solution. How will I get the correkt answer using that calculator ?

Quote:

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Originally Posted by Serialkisser

My calculator is defekt, and I need to finish an assignment in trigonometry.
Does anyone know any good online calculator to use sin,cos and tan ?

Im currently using this one : eCalc - Online Scientific Calculator
seems like a good calculator, but I dont get the following:


I am looking at a sample:

Quote:

---

Let x represent the hypotenuse, side AC.

sin = O/H
sin56=32/x
xsin56=32
x=32/sin56
x=38.6cm

---

Dividing 32 by sin 56 using the above calculator gives me a totally different solution. How will I get the correkt answer using that calculator ?

---

For the given input, the calculator is giving you the correct output. Either the input is wrong or the answer you're checking against is wrong.

I tried everything, what Input would be correct to get 38.6 ?

It clearly shows that 32 has to be divided by sin 56 - I tried the other way too; but the output wasnt the same as the solution in the example which is 38.6.

Quote:

---

Originally Posted by Serialkisser

I tried everything, what Input would be correct to get 38.6 ?

It clearly shows that 32 has to be divided by sin 56 - I tried the other way too; but the output wasnt the same as the solution in the example which is 38.6.

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Sorry, are you saying your on-line calculator is NOT giving 38.6 ...?

38.6 is the correct answer for the euqtion you've posted. If the on-line calculator is NOT giving you this answer, can I hazard a guess and say it's giving you a negative answer ....? (This would happen if the calculator thought the angle was being measured in radians rather than degrees).

On the online calculator:
Input:

32/sin(56) = -61.355

2nd try:

sin(56)/32= -0.01

3rd try:

sin(56) = -0.521/32 = -0.01

No clue how to get the right answer ... what did you input ?

Quote:

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Originally Posted by Serialkisser

On the online calculator:
Input:

32/sin(56) = -61.355

2nd try:

sin(56)/32= -0.01

3rd try:

sin(56) = -0.521/32 = -0.01

No clue how to get the right answer ... what did you input ?

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The on-line calculator is assuming that angles are measured in radians. You have to tell it that the angle is being measured in degrees.

If it works like the Google calculator ( sin(30 degrees) - Google Search ) then you have to type "56 degrees" as part of the input.

use this calculator

Scientific Calculator

input 56sin

then press 1/x

then multiply by 32 and you will get your answer

Somehow I have to use the 2nd function like in a scientific calculator; but the calculator I have given has no 2nd function and like you recognized it measures in radians ... i tried to put degrees beside it, but it didnt work... using the google calculator I get the sin number; but somehow I have to enter that number using the 2nd function in a regular scientific calculator to get my final answer ... do you know what to write to get that in google ?

Quote:

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Originally Posted by Serialkisser

Somehow I have to use the 2nd function like in a scientific calculator; but the calculator I have given has no 2nd function and like you recognized it measures in radians ... i tried to put degrees beside it, but it didnt work... using the google calculator I get the sin number; but somehow I have to enter that number using the 2nd function in a regular scientific calculator to get my final answer ... do you know what to write to get that in google ?

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I don't see the problem .....:

32/sin(56 degrees) - Google Search

Got it :-) Now I can start working on it, thanks a lot.

Solved 3 Questions so far, but now there is the following:

sin = o/H
sin = 24/32
(The degree is a zero with a line crossing the middle.)
sin = 0.75

What should I input in google ? I tried 0.75/sin(0 degrees)
but the answer didnt come up :S

Quote:

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Originally Posted by Serialkisser

Solved 3 Questions so far, but now there is the following:

sin = o/H
sin = 24/32
(The degree is a zero with a line crossing the middle.)
sin = 0.75

What should I input in google ? I tried 0.75/sin(0 degrees)
but the answer didnt come up :S

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Your first mistake is in not having an angle. Sin of what = 24/32.

So the equation should be sin(a) = 24/32 and solve for a.

arcsin(3/4) in degrees - Google Search