If `cos63^@ cos57^@ sin 87^@` is equal to `(cosk^@)/m` Where `k and m` are natural numbers and `k in (0,180)` then find `(k-m).`

If sin 47^@+sin61^@-sin11^@-sin25^@ equals cosk^@ ,then k=?

If cos25^(0)+sin25^(0)=K, then cos50^(@) is equal to

If cos17^(@)+sin17^(@)=k, then cos34^(@) equals

If cos 25^0 + sin 25^0 = K , then cos 50^0 is equal to

If cos 28^(@) + sin 28^(@) = k^(3), then cos 17^(@) is equal to

int_(0)^( pi)sqrt((cos x+cos2x+cos3x)^(2)+(sin x+sin2x+sin3x)^(2))dx is equal to ((pi)/(k)+w), where k and w are positive integers,find the value of (k^(2)+w^(2))

The equation sin x(sinx+cos x) = k has real solutions, where k is a real number. Then

If cos 28^(@)+sin 28^(@)=k^(3) , then cos17^(@) equal to