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1:49
YouTube
Ravi Ranjan Kumar Singh
cos150 | cos(150)| cosine of 150 degree | First Method
In this video, we learn to find the value of cos150. Here I have applied cos(90 + x) = -sin(x) identity to find the value of cos(150). The URL of the video explaining step by step ‘How to prove the identity cos(90 + x) = -sin(x)?’ is given below. https://youtu.be/12VJ9CgoEcs Other topics of the video are: Value of cos150 What is the value ...
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