Prove thattanA + 2 tan2A + 4 tan4A + 8 cot8A = cotA
ankit agrawal , 12 Years ago
Grade 11
Trigonometry> Compound angles...
3 Answers
pavani suhani
Last Activity: 12 Years ago
cotA-tanA=2cot2A
cotA-cotA+tanA+2tan2A+4tan4A+8cot8A
=cotA-2cot2A+2tan2A+4tan4A+8cot8A
=cotA-4cot4A+4tan4A+8cot8A
=cotA-8cot8A+8cot8A
=cotA
Ashwin Muralidharan IIT Madras
Last Activity: 12 Years ago
Hi Ankit,
Best Regards,
Ashwin (IIT Madras).
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