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Use double angle identities to find values of the sine and cosine functions for each angle. (a) 28, given sin 0 = and cos 0<0 and cos 0 <0 %D (b) 2x, given tan x = 2 and cos x > 0 %3D V5 and cos 0> 0 7. (c) 20, given sin 0 =

Use double angle identities to find values of the sine and cosine functions for each angle. (a) 28, given sin 0 = and cos 0<0 and cos 0 <0 %D (b) 2x, given tan x = 2 and cos x > 0 %3D V5 and cos 0> 0 7. (c) 20, given sin 0 =

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Use the double angle identities to find values of the sine and cosine functions for each angle. 

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Exercise 1.3 1. Use double angle identities to find values of the sine and cosine functions for each angle. 21 (a) 20, given sin 0 = and cos 0 <0 (b) 2x, given tan x = 2 and cos x>0 V5 and cos 0> 0 7. (c) 26, given sin 0 = 3. (d) 0, given cos 20 and 0 terminates in quadrant I %3D 3. (e) 0, given 26 = and 0 terminates in quadrant III 4. (f) 8, given cos 20 5 and 90° < 0 < 180° 12 %3D (g) 0, given cos 20 and 90° <0 < 180° %3D 3.
Transcribed Image Text:Exercise 1.3 1. Use double angle identities to find values of the sine and cosine functions for each angle. 21 (a) 20, given sin 0 = and cos 0 <0 (b) 2x, given tan x = 2 and cos x>0 V5 and cos 0> 0 7. (c) 26, given sin 0 = 3. (d) 0, given cos 20 and 0 terminates in quadrant I %3D 3. (e) 0, given 26 = and 0 terminates in quadrant III 4. (f) 8, given cos 20 5 and 90° < 0 < 180° 12 %3D (g) 0, given cos 20 and 90° <0 < 180° %3D 3.
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