(chatquestion)...sin 0 sin 20 sin 30 sin no cose cos 0 cos e cos" 0 cos (n+1)0 3) sin 0 cos" 0 1) cot 0+ cos(n+1) cos(n+1)0 2) cot 0- cot 0 4) none of these sin 0 cos" 0 sin 0 cos" 0...(Solution please)

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