Answer problem #3, showing ALL work accordingly. Thank you. Problem 3 Use the half-angle formulas to...

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Answer problem #3, showing ALL work accordingly. Thank you.
Problem 3 Use the half-angle formulas to find sin(22.5) and cos(22.5°)

Answer 1

Answer #1

We know sin 45° = Cos 45°=t ter We have the formula, sin 20 = 2 sino caso Cos 20 = 2005²0 - 1 (1) COS 20 = - 2sino (2) and No

Answer 2

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