`sin6 5^(@)+sin2 5^(@)=`

Prove that: "sin"(pi)/(5)"sin"(2pi)/(5)"sin"(3pi)/(5)"sin"(4pi)/(5)=(5)/(16) "sin"36^(@) "sin"72^(@) "sin"108^(@) sin 144^(@)=(5)/(16) .

2sqrt(2)sin10^(@)((sec5^(@))/(2)+(cos40^(@))/(sin5^(@))-2sin35^(@))=?

2sqrt(2)sin10^(@)[(sec5)/(2)+(cos40^(@))/(sin5^(@))-2sin35^(@)]

The value of (cos ^(6)5^(@)-15 cos ^(4) 5^(@) sin ^(2)5^(@)+15 cos ^(2)5^(@)sin ^(4) 5^(@)-sin ^(6)5^(@)) is equal to-

sin ^(2) 24 ^(@) - sin ^(2) 6^(@) = (sqrt5 -1)/(8).

sin^(2)17.5^(@) +sin^(2)72.5^(@) is equal to:

(sin2^(@)+sin4^(@)+sin6^(@)+sin8^(@))/(cos1^(@)*cos2^(@)*cos5^(@))=

Evaluate sin ^ (- 1) (sin ((5 pi) / (6)))

sin5A=5cos^(4)A sin A-10cos^(2)A sin^(3)A+sin^(5)A

sin^(2)17.5^(@) + sin^(2)72.5^(@) is equal to