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Popular >

cos(126)

Solution

cos (12 6^{\circ})

Solution

- \frac{2 5 - 5}{4}

+1

Solution steps

cos (12 6^{\circ})

Rewrite using trig identities:

- sin (3 6^{\circ})

= - sin (3 6^{\circ})

Rewrite using trig identities:

sin (3 6^{\circ}) = \frac{2 5 - 5}{4}

= - \frac{2 5 - 5}{4}

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Frequently Asked Questions (FAQ)

What is the value of cos(126) ?
The value of cos(126) is -(sqrt(2)sqrt(5-\sqrt{5)})/4