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     EduGorilla 
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    cos 25° + cos 55° + cos 65° + cos 145° = ?

    Options :-

    1. Cosec 60° ⋅sin 45°
    2. Sin 40° ⋅ cosec 45°
    3. Sec 45° ⋅ cos 40°
    4. इनमे से कोई भी नहीं
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