Prove the following:`cos36^@=(frac(sqrt5+1)(4))`

Similar Questions

Explore conceptually related problems

Prove the following: sin18^@=(frac(sqrt5-1)(4))

Prove the following: sin36^ °=(frac(sqrt10-2sqrt5)(4))

Prove the following: cos^-1x = tan^-1(frac{sqrt(1-x^2)}[x}) , if x > 0 .

Prove the following: (frac(sec2A-1)(sec4A-1))=frac(tanA)(tan4A)

Prove the following: cos^-1(frac{3}{5})+cos^-1(frac{4}{5}) = frac{pi}{2}

Prove the following: cos^-1(frac{4}{5})+cos^-1(frac{12}{13}) = cos^-1(frac{33}{65})

Prove the following: sin^-1(frac{1}{sqrt2})-3sin^-1(frac{sqrt3}{2}) = frac{-3pi}{4}

Prove the following: sqrt(frac(1+sin2x)(1-sin2x))=tan(pi/4+x)

Prove the following: (frac(2cos4x+1)(2cosx+1))=(2cosx-1)(2cos2x-1)

Find the principal values of the following: cos^-1(frac{sqrt3}{2})