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Popular >

cos(-1(5/7))

Solution

cos (- 1 (\frac{5}{7}))

Solution

cos (\frac{5}{7})

+1

Decimal Notation

0.75556 \dots

Solution steps

cos (- 1 \cdot (\frac{5}{7}))

= cos (- 1 \cdot \frac{5}{7})

Use the following property:

cos (- x) = cos (x)

cos (- 1 \frac{5}{7}) = cos (1 \frac{5}{7})

= cos (1 \cdot \frac{5}{7})

= cos (\frac{5}{7})

Popular Examples

tan (\frac{3}{2} π)

e^{pi/2}-e^{arctan(1+(\sqrt[4]{2/3})^2)}

cot (4 7^{\circ})

(tan(50)-tan(20))/(1+tan(50)tan(20))

\frac{tan ( 5 0 ^{\circ} ) - tan ( 2 0 ^{\circ} )}{1 + tan ( 5 0 ^{\circ} ) tan ( 2 0 ^{\circ} )}

42 sin (4 0^{\circ})

Frequently Asked Questions (FAQ)

What is the value of cos(-1(5/7)) ?
The value of cos(-1(5/7)) is cos(5/7)