![trigonometry - If $\cos (α + β) = 4 / 5$ and $\sin (α – β) = 5 / 13$, where $α$ lie between $0$ and $\pi/4$, find the value of $\tan2α$. - Mathematics Stack Exchange trigonometry - If $\cos (α + β) = 4 / 5$ and $\sin (α – β) = 5 / 13$, where $α$ lie between $0$ and $\pi/4$, find the value of $\tan2α$. - Mathematics Stack Exchange](https://i.stack.imgur.com/a8BWP.jpg)
trigonometry - If $\cos (α + β) = 4 / 5$ and $\sin (α – β) = 5 / 13$, where $α$ lie between $0$ and $\pi/4$, find the value of $\tan2α$. - Mathematics Stack Exchange
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trigonometry - How to make use of angle sum and difference identities to find the value of sine and cosine? - Mathematics Stack Exchange
![Explained: Given z_1 = 12(cos(pi/3) + i sin(pi/3)) and z_2 = 3(cos(5pi/6) + i sin(5pi/6)), find z_1/z_2 - Brainly.com Explained: Given z_1 = 12(cos(pi/3) + i sin(pi/3)) and z_2 = 3(cos(5pi/6) + i sin(5pi/6)), find z_1/z_2 - Brainly.com](https://us-static.z-dn.net/files/d30/2cf30ee8150ef0b11b1cc9dc6f40a5b3.png)
Explained: Given z_1 = 12(cos(pi/3) + i sin(pi/3)) and z_2 = 3(cos(5pi/6) + i sin(5pi/6)), find z_1/z_2 - Brainly.com
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