Question

146
ছয়ী গণিত
(ii) 8sin20° sin40° sin80° = 3
iii) tan20° tan40° tan80° = 3
iv
cos 40° cos 100° cos 160° =
8
প্রমাণ করাে:
ens cos(60° – ৪) cos(60° + 6
ii) 4 sin o sin
(3 +6
+ 6) sin -
9
3
৭​

Answer 1

Answer:

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