3. Express 1++cos2x in terms of cos x. hence a. Evaluate (1+ cosx)dx b. Express 1- cos2x in terms of t, where t= tan-

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 40E
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Solve all Q 3, 4 explaining detailly each step

cose
cose
1. (YShow that for sin0 +1,
2 sec0
1+sing
1-sino
(ii) For 0°s 0 180°, find to the nearest tenth of a degree the solution of the equition
cos o = cos°0.
(ii)Express 3eos0 +6 sine= V22.5, giving the general solution in degrees.
2. i) Find in radians the values of x in the interval 0°<x<360° which satisfy the equatioa
cos2x- sin2x = 1.
ii) Find in radians the general solution of the equation cos5x + cos3x 0
ii) Express cosx-v3 sin x in the form R cos(x + ) where R>0 and 2 is and acute angle.
Hence find the maximum and minimum values of: -cosx-V3 sinx.
3. Express 1+cos2x in terms of cos x. hence
a. Evaluate (1 + cosx)dx
b. Express 1-cos2x in terms of t, where t=
4. a. Find to the nearest degree the value of 0 in the range 0°s0 s 360° for which
sin'o + 2cos20=2 cos0.
b. Express 4cos0 + 3sin0 in the form R cos(0 - a), R>0 and a is an acute angle, giving the
value of a to the nearest tenth of a degree. Hence, find, to the nearest dearee, the range of
values of 0 between 0o and 360° for which 4 cos0 +3sin0<3.
5. ) Find the value of 0 for which cos20- 2cos0 = 3, in the interval: 0°<0<27.
ii) Find in radians the ge solution of the equation sin20 - V3 cos0 0.
ii) Given that f(0) = 12 sin 0-5 cos0, express f(0) in the formr sin (0 - a) where r>0 and
tan
%3D
38
Transcribed Image Text:cose cose 1. (YShow that for sin0 +1, 2 sec0 1+sing 1-sino (ii) For 0°s 0 180°, find to the nearest tenth of a degree the solution of the equition cos o = cos°0. (ii)Express 3eos0 +6 sine= V22.5, giving the general solution in degrees. 2. i) Find in radians the values of x in the interval 0°<x<360° which satisfy the equatioa cos2x- sin2x = 1. ii) Find in radians the general solution of the equation cos5x + cos3x 0 ii) Express cosx-v3 sin x in the form R cos(x + ) where R>0 and 2 is and acute angle. Hence find the maximum and minimum values of: -cosx-V3 sinx. 3. Express 1+cos2x in terms of cos x. hence a. Evaluate (1 + cosx)dx b. Express 1-cos2x in terms of t, where t= 4. a. Find to the nearest degree the value of 0 in the range 0°s0 s 360° for which sin'o + 2cos20=2 cos0. b. Express 4cos0 + 3sin0 in the form R cos(0 - a), R>0 and a is an acute angle, giving the value of a to the nearest tenth of a degree. Hence, find, to the nearest dearee, the range of values of 0 between 0o and 360° for which 4 cos0 +3sin0<3. 5. ) Find the value of 0 for which cos20- 2cos0 = 3, in the interval: 0°<0<27. ii) Find in radians the ge solution of the equation sin20 - V3 cos0 0. ii) Given that f(0) = 12 sin 0-5 cos0, express f(0) in the formr sin (0 - a) where r>0 and tan %3D 38
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