Guest

what is the value of cos12 + cos84 + cos156 + cos132

what is the value of cos12 + cos84 + cos156 + cos132

Grade:

2 Answers

Sunil Raikwar
askIITians Faculty 45 Points
8 years ago
cos132+cos12+cos156+cos84
=2cos72cos60+2cos120cos36
=2[(root5-1)/4]1/2+2(-1/2)(root5+1)/4
=-1/2

Thanks & Regards
Sunil Raikwar
askIITians Faculty
verma
13 Points
5 years ago
Herohsjjsjsjsnsnsmjdhrrjrueieow9w9w9whehdcdccccffgvvht585jfhHamre dil me liye to ham bhagvan se bhi lad jayengeHamre dil me liye to ham bhagvan se bhi lad jayengeHamre dil me liye to ham bhagvan se bhi lad jayengeHamre dil me liye to ham bhagvan se bhi lad jayenge

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free