The value of cos ³((π)/8) cos ((3π)/8) + sin ³((π)/8) sin ((3π)/8) is:

Trigonometry: JEE Main 2020 Mathematics question

JEE Main 2020 · 9 Jan, Morning shift · Q5652

JEE Main 20209 Jan, Morning shiftMathematicsMediumTrigonometry118× since 2002

The value of

{\cos ^3}\left( {{\pi \over 8}} \right)

{\cos}\left( {{3\pi \over 8}} \right)

{\sin ^3}\left( {{\pi \over 8}} \right)

{\sin}\left( {{3\pi \over 8}} \right)

is :

JEE Main 2020 · 9 Jan, Morning shift · Q5652

JEE Main 20209 Jan, Morning shiftMathematicsMediumTrigonometry118× since 2002

The value of

{\cos ^3}\left( {{\pi \over 8}} \right)

{\cos}\left( {{3\pi \over 8}} \right)

{\sin ^3}\left( {{\pi \over 8}} \right)

{\sin}\left( {{3\pi \over 8}} \right)

is :