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Prove it...please prove the question step by step |
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Answer» cos6x = 32cos⁶x - 48 cos⁴x + 18 cos²x - 1 LHS ↓cos6x = cos(2×3x)
cos6x = 2cos²(3x) −1cos6x = 2 (cos 3x)² − 1
cos6x = 2 (4cos³x − 3cosx)² –1cos6x = 2(16cos⁶x – 24cos⁴x + 9cos²x) – 1 cos6x = 32cos⁶x −48cos⁴x + 18cos²x – 1 RHS ↑LHS = RHS______HENCE PROVED ▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬ |
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