Use the cosine of a sum and cosine of a difference identities to find cos (s + t) and cos (s - t). COS S= and sint= - s and t in quadrant III . . . cos (s + t) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) cos (s - t) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)Two ships leave a port at the same time. The rst ship sails on a bearing of 59 at 12 knots (nautical miles per hour) and the second on a bearing of 149 at 26 knots. How far apart are they after 1.5 hours? (Neglect the curvature of the earth.) After 1.5 hours, the ships are approximately nautical miles apart. (Round to the nearest nautical mile as needed.) Solve the equation for exact solutions in the interval [0,360). Use an algebraic method. 65ec29t3n3=8tan3 <:> Select the correct choice below and, if necessary, ll in the answer box to complete your choice. '33:} A- The solution set is { }. (Simplify your answer. Type an integer or a fraction. Use a comma to separate answers as needed. Do not include the degree symbol in your answer.) {:2- B. The solution is the empty set. Airports A and B are 434 km apart, on an east-west line. Jim flies in a northeast direction from A to airport C. From C he flies 333 km on a bearing of 127 10' to B. How far is C from A? . . . The distance between C and A is km. (Round to the nearest kilometer as needed.)