Posted by **Kate** on Tuesday, July 20, 2010 at 9:01pm.

how do I solve this

arcsin(4/5)

note that I am not looking for about 53 degrees

I believe I'm suppose to solve euler's formula for x

i.e.

sin (x) = (e^(ix) - e^(-ix))/(2i)

where x is in radians

hence I would do something like this

sin (x) = (e^(ix) - e^(-ix))/(2i) = 4/5

(e^(ix) - e^(-ix))/(2i) = 4/5

solve the equation above for x

this is were I need help if somebody could just show me quickly how to do this that would be great!!!

If I remeber correctly I need to use cis(x) or something right?

## Answer this Question

## Related Questions

- math - Eliminate the parameter (What does that mean?) and write a rectangular ...
- math - Can anyone help w/ these. 1) Solve the equation in the internal [0deg, ...
- Trigonometry - I need help with I just can't seem to get anywhere. this is as ...
- Math Please Assist - Solve exactly for x: sin^3 x + sin x cos^2 x = cos x If 0 ...
- Calc - Solve the equation for x. arcsin(sq. rt.(2x)) = arccos(sq. rt(x))
- pre calc - Use the sum-to-product formula to simplify the expression: If sin 52...
- Math - In obtuse triangle PQR, P=51 degrees, p= 10cm, and the longest side, q=...
- Calc. - Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x ln...
- calculus - Hello! Just needed help with understanding this specific question. We...
- trig - please help me with some questions I skipped on a review for our test ...

More Related Questions