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Popular >

cos(-13)

Solution

cos (- 1 3^{\circ})

Solution

cos (\frac{13 π}{180})

+1

Decimal Notation

0.97437 \dots

Solution steps

cos (- 1 3^{\circ})

Use the following property:

cos (- x) = cos (x)

cos (- 1 3^{\circ}) = cos (1 3^{\circ})

= cos (1 3^{\circ})

Popular Examples

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\frac{sin ( 2 0 ^{\circ} )}{sin ( 1 5 ^{\circ} )}

cos^2(0.5)+cos^2(1)+cos^2(1.5)

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69.8cos^2(90-91.428)

69.8 cos^{2} (9 0^{\circ} - 91.42 8^{\circ})

Frequently Asked Questions (FAQ)

What is the value of cos(-13) ?
The value of cos(-13) is cos((13pi)/(180))