What is cos^2(θ/5)-sin^2(θ/5) ?

The solution to cos^2(θ/5)-sin^2(θ/5) is cos((2θ)/5)

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simplify cos^2(θ/5)-sin^2(θ/5)

simplify

cos^{2} (\frac{θ}{5}) - sin^{2} (\frac{θ}{5})

cos (\frac{2 θ}{5})

Solution steps

cos^{2} (\frac{θ}{5}) - sin^{2} (\frac{θ}{5})

Rewrite using trig identities

= cos (\frac{2 θ}{5})

\frac{4.1 \cdot 1 0 ^{- 3}}{8.6 \cdot 1 0 ^{- 6}}

3 x^{3} (2 x)^{2}

4^{l o g_{2} (3)}

7 \cdot 20

What is cos^2(θ/5)-sin^2(θ/5) ?
The solution to cos^2(θ/5)-sin^2(θ/5) is cos((2θ)/5)