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Given that -
CosA + cos*2A = 1
CosA = 1 - cos*2A
CosA = Sin*2A
Now, put the value of cosA in R. H. S
Sin*2A + sin*4A
CosA + cos*2A
Hence proved, LHS=RHS

Mahak Mudatkar , 4 Years ago
Grade 10
anser 2 Answers
Arun

Last Activity: 4 Years ago

Dear student
 
What is the question part. Please check and repost the question. You can also attach an image.

Vikas TU

Last Activity: 4 Years ago

Dear student 
Question is not clear 
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