sin² 22.5 + sin² 67.5 = ?
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Answer: The exact value of sin 22.5° using the half-angle formula is √(2 - √2) / 2 or 0.38. Let us proceed step by step to find the exact values of sin 22.5° using the half-angle formula. If θ = 22.5° then 2θ is 45°.
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above answer is correct iiiii
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