Question

How to find the value of sinx/2 when sinx is given​

Answer 1

Answer:

Let me show you by with an example

Step-by-step explanation:

If sin x = 5/13, cos x = 12/13

cos x = cos^2 (x/2) - sin^2(x/2) = 1–2sin^2(x/2), or

2sin^2(x/2)= 1 - cos x = 1–12/13 = 1/13, or

sin^2(x/2) = 1/(2*13) = 1/26, or

sin (x/2) =(1/26)^0.5 = 26^0.5/26.

Answer 2

Answer:

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