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77julia77 [94]
3 years ago
6

The identity sin (theta/2) = +- sqrt 1-cos theta/2 is derived from which other identity?

Mathematics
1 answer:
Valentin [98]3 years ago
6 0

Answer:

2nd option

Step-by-step explanation:

Using

sin²A = \frac{1-cos2A}{2} ( take the square root of both sides )

sinA = ± \sqrt{\frac{1-cos2A}{2} }

Replace 2A with θ and A with \frac{0}{2} , then

sin (\frac{0}{2} ) = ± \sqrt{\frac{1-cos20}{2} }

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