Math, asked by ally9400, 1 year ago

Prove that cos 1 cos 2 cos 3°.........cos 180° = 0

Answers

Answered by priyanshumanas
33
your answer is in given photo
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Answered by mysticd
8

 LHS = cos1\degree cos2\degree </p><p>cos3\degree \cdot\cdot\cdot \times cos180\degree \\= cos1\degree cos2\degree </p><p>cos3\degree \cdot\cdot\cdot \times \pink {cos 90\degree} \cdot \cdot \cdot \times cos180\degree\\= cos1\degree cos2\degree </p><p>cos3\degree \cdot\cdot\cdot \times\pink{ 0 }\times  \cdot \cdot \cdot ,cos180\degree

 \boxed { \blue { Value \:of \:cos 90\degree = 0 }}

 = 0 \\= RHS

 Hence , proved .

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