Use a half-angle formula to find the exact value of the following expression. sin 157.5° Determine an appropriate half-angle formula for sine and the measure of the angle. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal.) O A. 1+ cos sin 157.5° = 2 OB. 1+cos sin 157,5°= - 1- cos sin 157.5°= - O D. sin 157.5° = 1- cos

Use a half-angle formula to find the exact value of the following expression. sin 157.5° Determine an appropriate half-angle formula for sine and the measure of the angle. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal.) O A. 1+ cos sin 157.5° = 2 OB. 1+cos sin 157,5°= - 1- cos sin 157.5°= - O D. sin 157.5° = 1- cos

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter6: Equations

Section6.1: Solving Trigonometric Equations

Problem 93PS: Find the angle of elevation of a rifle barrel, if a bullet fired at 1,500 feet per second takes 2...

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Use a reference angle to find the exact value of cos210o. a. 12 b. 32 c. 22 d. 12
Find the degree measures that correspond to the radian measures 4/3 and 1.3
YOUR TURN a Convert 210 to radians. b Convert 3/4 radians to degrees.
Evaluate the sine and cotangent functions at the quadrantal angle 32.
Find the angle of elevation of a rifle barrel, if a bullet fired at 1,500 feet per second takes 2 seconds to reach a height of 750 feet. Give your answer to the nearest tenth of a degree.