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Prove that tan50=tan40+2tan10

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Prove that tan50=tan40+2tan10
  • 2 answers

Harshika Saxena 5 years, 10 months ago

Nice ??

Aastha Garg 5 years, 10 months ago

tan50=tan(40+10) Now, tan(40+10) =(tan40+tan10)/1-tan40tan10 tan50-tan50tan40tan10 = tan 40 + tan10 (*tan40=cot50) tan50-tan10=tan40+tan10 tan50 = tan40+2tan10 hence proved
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