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Multiple and submultiple angles formula

Multiple and submultiple angles formula

Trigonometric ratios of multiple and submultiple angles formula

Trigonometric Ratios of Sub Multiple Angles : In this post we will discuss about Trigonometric Multiple and submultiple angles formula.

  • (i) sin A = 2 sinA/2 cosA/2
  • (ii) cos A = cosA/2 – sin2A/2
  • (iii) cos  A = 2 cos2A/2 – 1 
  • (iv) cos A = 1 – 2 sin2A/2 
  • (v) 1 + cos A = 2 cos2A/2
  • (vi) 1 – cos A = 2 sin2A/2
  • (vii) tanA/2 = (1−cosA)/(1+cosA)
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