A physicist needs to calculate the exact value of a force (measured in newtons) in the horizontal direction with the expression 25 cos 75. Simplify this expression to find the exact value. O A. 25 V2- V3 N 4 O B. 25 V2-~3 N 2 O C. 25V3 N 2 O D. 25 V3 N 4Which trigonometric identity below can you use to show that cos? sin 8 + tan & .V 2 tan & O A. cos' 8 = 1+cos 28 2 O B. 1+ cose COS 2 O C. tan' 8 = 1- cos 28 1+ cos 28 O D. 1- cose tan sin 8The proof below shows that sin 8-sin3 9- sin 20cos' g Which expression will complete the third step of the proof? 2 cos 8 sin 8 - sin 8 = sin @(1-sin? 8) sin 8- sin 8 = sin @(1- sin? @) | 2cos 8 2cos & sin 8 - sin'8= sin 8- sin39_ sin 20cos a 2cose O A. (2 sin @cose) (1 - sin? @) O B. (sin 20 cos 20) (1 - sin? 8) O C. ( sin 20cos 20)(1 - sin? @) 2 cose O D. (2 sin @cose) (1 - sine) 2 cose