Please help with these all questions

COMPLETE THIS SECTION ON A SEPARATE PIECE OF PAPER! 1. Solve for the missing side or angle using the appropriate trigonometric method in each of the following: a) Find the angle measure of angle B. b) Find the length of side x. 12 m C 10.8 cm Z 350 7 m 60 B c) Find the angle measure of angle A. d) Find the length of side b. 60 m 45 m A 70 m 48 18 mm B B 2. A surveyor wants to calculate the shortest 3. Calculate the height of the silo to the nearest tenth distance across the Detroit river. Round to the of a metre. nearest tenth of a metre. Detroit 200 m 42 140 85 B 40 m Windsor 3. The engineers at Mount Brighton are creating blue-prints for a new ski-lift they would like to open for next winter. They have determined that energies-11-0352. ..png Humphrey-and-Br..png 1581655448.png185 Exit Fullscreen Windsor 3. The engineers at Mount Brighton are creating blue-prints for a new ski-lift they would like to open for next winter. They have determined that an angle of elevation which would provide a safe incline for the ride up the lift would be 18. They also know that the height of the hill from the base of the mountain to the top is 500 m. Determine how long the wire must be for the ski- lift from the bottom to the top of the mountain. 4. State the primary trig ratios and the reciprocal trig ratios for the following angle: MCR 3U - Grade 11 University Exam Review 9 of 1 P ( - 2, 5) Ty VX to prove it: 5. Prove the following trigonometric identity is true and state the names of the identities used sin20 + 2cos20 - 1 = cos30 energies-11-0352...png Humphrey-and-Br_.png 1581655448.pngExit Fullscreen 5. Prove the following trigonometric identity is true and state the names of the identities used to prove it: sin20 + 2cos20 - 1 = cos20 6. To estimate the amount of usable lumber in a tree, Chitra must first estimate the height of the tree. From points A and B on the ground, she determined that the angles of elevation for a certain tree were 410 and 520, respectively. The angle formed at the base of the tree between points A and B is 90 and A and B are 30 m apart. If the tree is perpendicular to the ground, what is its height to the nearest metre? Unit 6 Exam Review - Sinusoidal Functions MCR 3U - Grade 11 University Exam Review 10 of 15 energies- 11-0352 png Humphrey-and-Br..png ~ 1581655448.png