This is a problem of sequence which also relates to Mathematics Induction. To find the general term of this sequence you must fix both trigonometry function and Mathematics Induction. First, you need to find the second term of U1 then, you predict the general term which is right for all terms, then use MI.
Find the product of all terms themselves, you must use formula of Sin2a=2cosasina and then, you will simplify and find the right answer as in the video.
Find the product of all terms themselves, you must use formula of Sin2a=2cosasina and then, you will simplify and find the right answer as in the video.
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