+√√² cas² S 4 cos²20 de is One of the correct steps to evaluate @ 1²00-1/²160²20 4 de- A sin²20d0 Ⓒ (в [√²+√ ] S B * de + cos 40d0 0 0 K © √ = 40 + S sin²20d0 0 0 K Ⓒ = [√ ² 1 - 1 + D do 2 0 0 cos 40d0

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