![Without the use of a calculator or a table, how do you the exact value of sin (arc tangent of 1/2)? - Quora Without the use of a calculator or a table, how do you the exact value of sin (arc tangent of 1/2)? - Quora](https://qph.cf2.quoracdn.net/main-qimg-267abbed4d99f78c463406f3ee79654a.webp)
Without the use of a calculator or a table, how do you the exact value of sin (arc tangent of 1/2)? - Quora
![Dave Richeson on Twitter: "Euler proved that π/4=arctan(1/2)+arctan(1/3), which can be used for computing digits of π (using the arctangent series). I wondered if I could prove it without using a trig Dave Richeson on Twitter: "Euler proved that π/4=arctan(1/2)+arctan(1/3), which can be used for computing digits of π (using the arctangent series). I wondered if I could prove it without using a trig](https://pbs.twimg.com/media/DhXRIQiX0AA9cMz.jpg:large)
Dave Richeson on Twitter: "Euler proved that π/4=arctan(1/2)+arctan(1/3), which can be used for computing digits of π (using the arctangent series). I wondered if I could prove it without using a trig
Without the use of a calculator or a table, how do you the exact value of sin (arc tangent of 1/2)? - Quora
![Find the exact value of the expression. Use a graphing utility to verify your result. sin(arctan 4/3). | Homework.Study.com Find the exact value of the expression. Use a graphing utility to verify your result. sin(arctan 4/3). | Homework.Study.com](https://homework.study.com/cimages/multimages/16/triangle1310709565969981489.png)