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Popular >

cos^2(-45)

Solution

cos^{2} (- 4 5^{\circ})

Solution

\frac{1}{2}

+1

Solution steps

cos^{2} (- 4 5^{\circ})

Rewrite using trig identities:

cos (- 4 5^{\circ}) = \frac{2}{2}

= (\frac{2}{2})^{2}

Simplify

(\frac{2}{2})^{2} : \frac{1}{2}

= \frac{1}{2}

Popular Examples

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tan^{2} (4 5^{\circ} - \frac{32}{2})

sin^{2} (- 4 5^{\circ})

Frequently Asked Questions (FAQ)

What is the value of cos^2(-45) ?
The value of cos^2(-45) is 1/2