![Calcul de cos (pi/12) et sin (pi/12), exercice de trigonométrie et fonctions trigonométriques - 526934 Calcul de cos (pi/12) et sin (pi/12), exercice de trigonométrie et fonctions trigonométriques - 526934](https://www.ilemaths.net/img/forum_img/0526/forum_526934_1.png)
Calcul de cos (pi/12) et sin (pi/12), exercice de trigonométrie et fonctions trigonométriques - 526934
![A chord with a length of 12 runs from pi/12 to pi/6 radians on a circle. What is the area of the circle? | Socratic A chord with a length of 12 runs from pi/12 to pi/6 radians on a circle. What is the area of the circle? | Socratic](https://useruploads.socratic.org/WOFoAjXVRA61HjpZDsQk_chord.png)
A chord with a length of 12 runs from pi/12 to pi/6 radians on a circle. What is the area of the circle? | Socratic
![How to prove that [math]2\sin\left(\frac{5\pi}{12}\right)\sin\left(\frac{\pi }{12}\right)=\frac{1}{2}[/math] - Quora How to prove that [math]2\sin\left(\frac{5\pi}{12}\right)\sin\left(\frac{\pi }{12}\right)=\frac{1}{2}[/math] - Quora](https://qph.cf2.quoracdn.net/main-qimg-0816adfe5a34beedf46e60fe8077204e.webp)
How to prove that [math]2\sin\left(\frac{5\pi}{12}\right)\sin\left(\frac{\pi }{12}\right)=\frac{1}{2}[/math] - Quora
![calculus - Is it possible to express $\sin \frac{\pi}{9}$ in terms of radicals? - Mathematics Stack Exchange calculus - Is it possible to express $\sin \frac{\pi}{9}$ in terms of radicals? - Mathematics Stack Exchange](https://i.stack.imgur.com/r8uHr.gif)
calculus - Is it possible to express $\sin \frac{\pi}{9}$ in terms of radicals? - Mathematics Stack Exchange
![Prove that (i) " 2sin " (5pi)/(12) " sin " (pi)/(12)=(1)/(2) (ii) " 2 cos " (5pi)/(12) " cos " .(pi)/(12)=(1)/(2) (iii) " 2 sin ".(5pi)/(12) " cos " (pi)/(2) = ((2+sqrt(3))/(2)) Prove that (i) " 2sin " (5pi)/(12) " sin " (pi)/(12)=(1)/(2) (ii) " 2 cos " (5pi)/(12) " cos " .(pi)/(12)=(1)/(2) (iii) " 2 sin ".(5pi)/(12) " cos " (pi)/(2) = ((2+sqrt(3))/(2))](https://d10lpgp6xz60nq.cloudfront.net/ss/web/1295554.jpg)
Prove that (i) " 2sin " (5pi)/(12) " sin " (pi)/(12)=(1)/(2) (ii) " 2 cos " (5pi)/(12) " cos " .(pi)/(12)=(1)/(2) (iii) " 2 sin ".(5pi)/(12) " cos " (pi)/(2) = ((2+sqrt(3))/(2))
![How do you find the exact functional value sin (pi/12) using the cosine sum or difference identity? | Socratic How do you find the exact functional value sin (pi/12) using the cosine sum or difference identity? | Socratic](https://useruploads.socratic.org/Tgsmmm5HTbGtEG4fqINn_Unit%20Circle.jpg)