Grade 12Trigonometry
(Cosa.cos2a.........cos2**k.a) summations up to k th here a is angle
(Cosa.cos2a.........cos2**k.a) summations up to k th here a is angle
1 Answer
Deepak Kumar Shringi
this is a direct formula..you can also drive it by multiplying and dividing by 2sina and the use sin2a then divide and multilpy by 2 and this time you will get sin4a and so on..........
sin 2ka/2ksina
sin 2ka/2ksina
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