Find the value of `(5sin75^(@)sin77^(@)+2cos13^(@)cos15^(@))/(cos15^(@)sin77^(@))-(7sin81^(@))/(cos9^(@))`

value of (5sin75^(@)sin77^(@)+2cos13^(@)cos15^(@))/(cos15^(@)sin77^(@))-(7sin81^(@))/(cos9^(@)) is

Find the value of (sin75^(@)+sin15^(@))/(cos75^(@)+cos15^(@)) :

sin75^(@)-sin15^(@)=cos105^(@)+cos15^(@)

What is the value of (5 sin 75^@ sin 77^@ + 2 cos 13^@ cos 15^@)/(cos 15^@ sin 77^@) - (7 sin 81^@)/(cos 9^@) ?

sin47^(@)+cos77^(@)=cos17^(@)

The value of cos15^(@)-sin15^(@) is

The value of 2 sin 15^(@).cos75^(@)

Simplify (sin75^(@)-sin15^(@))/(cos75^(@)+cos15^(@))