What is the value of arcsin(cos((3pi)/5)) ?

The value of arcsin(cos((3pi)/5)) is -pi/(10)

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arcsin(cos((3pi)/5))

arcsin (cos (\frac{3 π}{5}))

- \frac{π}{10}

Solution steps

arcsin (cos (\frac{3 π}{5}))

Rewrite using trig identities:

cos (\frac{3 π}{5}) = sin (- \frac{π}{10})

= arcsin (sin (- \frac{π}{10}))

Use the inverse trig property:

- \frac{π}{10}

= - \frac{π}{10}

csc (- \frac{π}{12})

cos (2 arccos (0.5))

arcsin (\frac{1.52 \cdot sin ( 5 1 ^{\circ} )}{1.33})

\frac{20}{tan ( 1 5 ^{\circ} )}

cos (4 0^{\circ}) + cos (8 0^{\circ}) + cos (10 0^{\circ}) + cos (12 0^{\circ}) + cos (14 0^{\circ})

What is the value of arcsin(cos((3pi)/5)) ?
The value of arcsin(cos((3pi)/5)) is -pi/(10)