This is the Solution of Question From RD SHARMA book of CLASS 11 CHAPTER TRIGONOMETRIC FUNCTIONS 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: `cos5A=16cos^5A-20cos^3A+5cosA`
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Негізгі бет Prove that: `cos5A=16cos^5A-20cos^3A+5cosA`
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