Could I have at least 1 done pls lol. Idk where I went wrong. 3 as well.

1. Calculate the measure of ZOSP, to the nearest tenth of a degree. 6.2 3.9 &m 340 S R 2. A rescue helicopter flew from its home base for 35 km on a course of N30 W to pick up an accident victim. It then flew 25 km west to the hospital. a. What distance will the helicopter have to fly to return to its home base? b. On what course will the helicopter have to fly to return to its home base? (Express answers to the nearest unit.) 3. Prove each identity. a) tan Osin Ocos 0 =1-cos2 0