Grade 11Trigonometry
41,37,29So please give me this question solutionPlease explain the answer step by step
41,37,29
So please give me this question solution
Please explain the answer step by step
3 Answers
Saurabh Koranglekar
Approved Tutor Answer6 Years ago
Aditya Gupta
Approved Tutor Answer6 Years agoQ37
we know that cos2y= 2cos^2y – 1
put y = 2x
cos4x= 2[cos(2x)]^2 – 1= 2[2cos^2x – 1]^2 – 1. now let cosx=C
so cos4x= 2(4C^4+1 – 4C^2) – 1= 8C^4 – 8C^2+1
kindly approve :)
Vikas TU
Approved Tutor Answer6 Years agoHiii vedant
Please ask question in sequence , do not ask 2-3 question in same set , as image become blurt. and it is not clearly visible many times.
Good luck
Cheers
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