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Vectors

the given trigonometric equation is cosa.cos2a.cos3athen prove that is equal to 1by 4

Profile image of meghana p
6 Years agoGrade
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3 Answers

Profile image of Saurabh Koranglekar
6 Years ago
Dear student

Please check the question, kindly attach an image of the question

Given equation means it has LHS & RHS

Also what is to be found is not clear

Regards
Profile image of Arun
6 Years ago
Dear student
 
Question is not properly written. Please check and repost this. I can also ttach an image. I will be happy to help you.
 
Profile image of Vikas TU
6 Years ago
Dear student 
The question is correct 
You will get cos ^2(2a )=3/4.
therefore, cos 4A =(3/4)^(1/2).
Hope this will help 
Good Luck 
Cheers 

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