Question

What is the value of sin22.5

Answer 1

you would probably need a calculator for finding cosine, sine, and tangent, but the answer is 0.38

Answer 2

The Half Angle Formula for sine is:\[\boxed{~\\~ \sin^2\theta=\dfrac{1-\cos(2\theta)}2~\\~}\]

Answer 3

so that
\[\sin\theta=\sqrt{\dfrac{1-\cos(2\theta)}2}\]

Answer 4

note that 22.5*2 = 45

Answer 5

@sangineni come back . . .