半数恒等式を使用して sin(-pi/8) の正確な値を求める

2sin(π/8)sin(2π/8)sin(3π/8)sin(5π/8)sin(6π/8)sin(7π/8) value is ( JEE MAINS Aug 26 (2))

The value of 2 sin⁡(π/8) sin⁡〖(2π/8) sin⁡〖(3π/8) sin⁡〖(5π/8) sin⁡〖(6π/8) sin⁡(7π/8) 〗 〗 〗 〗...👇

How to find the exact value of sin(pi/8)

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