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The value oif the expressin `(1+cospi/10)(1+cos(3pi)/10)(1+cos(7pi)/10)(1+cos(9pi)/10)` is
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This is the Solution of Question From RD SHARMA book of CLASS 11 CHAPTER TRIGONOMETRIC RATIOS AND IDENTITIES This Question is also available in R S AGGARWAL book of CLASS 11 You can Find Solution of All Question From RD SHARMA and R S AGGARWAL book from class 6-12 on our app DOUBTNUT for Free
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==== QUESTION TEXT ====
Prove that: `(1+cospi/(10))(1+col s(3pi)/(10))(1+cos(7pi)/(10))(1+cos9//10)=1/(16)dot`
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==== QUESTION TEXT ====
Prove that: `(1+cospi/(10))(1+col s(3pi)/(10))(1+cos(7pi)/(10))(1+cos9//10)=1/(16)dot`
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==== SCORE 100% WITH DOUBTNUT ====
Doubtnut App has video solutions of ALL the NCERT questions from Class 6 to 12 (including IIT JEE). You can also ask any Math question and get a video solution for FREE from a library of more than 1 Lakh Math Videos
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5:30 PM - Class 9
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7:15 PM - Class 11
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