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

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

If cos25^0+sin25^0=p , then cos50^0 is

If cos 25^(@) + sin 25^(@) =p , then: cos 50^(@)=

If cos25^(@)+sin25^(@)=p , then cos 50^(@) is

If cos25^0+sin25^0=p , then cos50^0 is (a) sqrt(2-p^2) (b) -sqrt(2-p^2) (c) psqrt(2-p^2) (d) -psqrt(2-p^2)

If cos25^0+sin25^0=p , then cos50^0 is (a) sqrt(2-p^2) (b) -sqrt(2-p^2) (c) psqrt(2-p^2) (d) -psqrt(2-p^2)

If cos28^0+sin28^0=k^3, t h e ncos17^0 is equal to

cos5^@-sin25^@ is equal to