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Grade 12Trigonometry

What is double angle formula of sine & cosine in terms of tan

Profile image of Tulsi
4 Years agoGrade 12
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1 Answer

Profile image of Mayank Ranka
4 Years ago
Hi,
Here’s your answer

The double angle formulas of sin, cos, and tan are,
  • sin2A = 2 sin A cos A (or)(2 tan A) /(1 +tan2A)
  • cos2A = cos2A - sin2A (or) 2cos2A - 1 (or) 1 - 2sin2A (or) (1 - tan2A) /(1 +tan2A)
  • tan2A = (2 tan A) /(1 - tan2A)

Thanks
Regards
Ankit Gupta

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