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     EduGorilla 
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    Let  and  be non-zero real numbers such that 2(cos  – cos) + cos  cos  = 1. Then, which of the following is/are true?
    2(cos – cos) + cos cos = 1

    Options :-

    1. tan= 0
    2. tan
    3. tantan = 0
    4. tan+ tan = 0
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Reply To: Let  and  be non-zero real numbers such that 2(cos  – cos) + cos  cos &nbs….
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