1. Using the half-angle formulas fine the EXACT value of cos(22.5o) 2. verify the identity cos(3x)=(1-4sin2(x))cos(x)...

Question

Question

1. Using the half-angle formulas fine the EXACT value of cos(22.5^o)

2. verify the identity

cos(3x)=(1-4sin²(x))cos(x)

3. find the EXACT solutions in the interval [0,2pi)

sin(2beta)-2cos(beta)=0

******Please do not use and decimals in the set or answer process*****

Thank you so much

Answer 1

Answer #1

putting nal, in o) and (2) respectively weget, B = 37 and ß = 57 Here ß = 5T & [0, 25), so it is not exceptable. Also for rem

Answer 2

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