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The value of Sin 2π/7+sin4π/7+sin8π/7 is a)√7/8 b) 1/8 c) √7/2 d)-√7/2

chi , 9 Years ago
Grade 12
anser 2 Answers
mycroft holmes

Last Activity: 9 Years ago

For want of time, I am writing out the solution in two parts. I am posting the first part now. Will be posting the second part in some time.:

mycroft holmes

Last Activity: 9 Years ago

Continuing from where we left off, we need to evaluate the sum within the brackets now. For this we look at the denominator for inspiration. 
 

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