How to Find Angle ABD in Trigonometry

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Finding angle ABD in trigonometry is something you can do with the consine function. Find angle ABD in trigonometry with help from an expert in computers, with two degrees in both Computer Science and Applied Mathematics from the New Jersey Institute of Technology, in this free video clip.

Part of the Video Series: Math Skills
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Video Transcript

Hi, my name's Stefan. Today, I'm gonna be speaking on how to find angle ABD in trigonometry. Let's say you have the triangle here, and you have the angle ABD, there's the angle here ABD. Now, to find this angle, what you want to do is you want to use the cosign function, which means adjacent over hypotenuse. Cosign equals adjacent over hypotenuse. Now, the cosign of ABD is equivalent to adjacent DB over hypotenuse, AB. And now to find this angle, all we do is take the inverse of this, which is the arccos sin, so the arccos sin of DB over AB equals angle ABD. And that's how you solve it to get the angle.


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