$5. (i) show that: sin 0+sin 20 = tan 0 1+cos 0+cos 20 (ii)Find the general solution of the equation sin 4x + cos 2x = 0 (inSolve for x ,where0 sx aj the equation sin 3x + cos x = 0

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 79E
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Solve all Q35 explaining detailly each step

26. i) Express: 5cos0- 12sin0 in the form: Reos(0 + a) giving the values of R>0 and a to the
3
nearest degree. Hence find the maximum and minimum values of-
Scose-12sin@|+2
sin30+sine
2tane
27. i) Show that
cos30+cose
1-tan?e
ii) Prove that: sin(sin 0 - cos e) = 20 -1 for 0 <0 s
28. Find the general solution of the equation cos2x + 1 = cosx(.
%3D
sina+sinß
29 i) Prove that
cot()
cosa-cosß
2.
ii) find in radians, the general solution of the equation: tan2x tanx = -1
30. (i) Find the general solution of the equation Cose + 2 sin 0 = 0
(i) Express f(x), where f(x) = cosx + sinx, in the form R cos(x-2). where R>0 and . is an
acute angle. Hence, find the value of x for which the minimum value of
1.
occurs.
f(x)
31. show that cos2A
1-tan A
1+tan²A
Find, in radians, the general solution of the equation cos2x + = sin2x.
i) Find the general solution of the equation: sin 20 = sin@.
i) f(x) = cos x+ 2sin x.
a) Fxpress f(x) in the form: rcos(x-x), where r >0 and 0<x < 90°.
b) Find to the nearest tenth of a degree, the set of values of x which satisfy the equation:
cos x+ 2sin x = 1.
e) Show that: -V5 s cosx + 2 sin x5.
3 i) Given that: f(x)= v3 cosx + sin x, express f(x) in the forım: Rcos (x-2). Where R >
Oand 0 <1<. Hence find the general solution of the equation: f(x) = 3
!!
sin 2x+sin 4x
ii) Prove that:
= tan 2x. Hence find the general solution of the equation:
1+cos 2x+cos 1x
1+cos 2x+cos 4x
=D 0.
sin 2x+sin 1x
34 Express cosx+ V3 sin x in the form R cos (x -A), where R> 0 and 0 <2 <
Hence find
(a) The general solution of the equation cosx + V3 sin x = V3
(b) The maximum and mininium values of cosx + V3 sin x + 2(
95. (i) show that:
sin 0+sin 20
= tan 0
1+cos 0+cos 20
(ii)Find the general solution of the equation sin 4x + cos 2x = 0
%3D
(iiSolve for x ,where0" <x the equation sin 3x + cos x 0
41
Transcribed Image Text:26. i) Express: 5cos0- 12sin0 in the form: Reos(0 + a) giving the values of R>0 and a to the 3 nearest degree. Hence find the maximum and minimum values of- Scose-12sin@|+2 sin30+sine 2tane 27. i) Show that cos30+cose 1-tan?e ii) Prove that: sin(sin 0 - cos e) = 20 -1 for 0 <0 s 28. Find the general solution of the equation cos2x + 1 = cosx(. %3D sina+sinß 29 i) Prove that cot() cosa-cosß 2. ii) find in radians, the general solution of the equation: tan2x tanx = -1 30. (i) Find the general solution of the equation Cose + 2 sin 0 = 0 (i) Express f(x), where f(x) = cosx + sinx, in the form R cos(x-2). where R>0 and . is an acute angle. Hence, find the value of x for which the minimum value of 1. occurs. f(x) 31. show that cos2A 1-tan A 1+tan²A Find, in radians, the general solution of the equation cos2x + = sin2x. i) Find the general solution of the equation: sin 20 = sin@. i) f(x) = cos x+ 2sin x. a) Fxpress f(x) in the form: rcos(x-x), where r >0 and 0<x < 90°. b) Find to the nearest tenth of a degree, the set of values of x which satisfy the equation: cos x+ 2sin x = 1. e) Show that: -V5 s cosx + 2 sin x5. 3 i) Given that: f(x)= v3 cosx + sin x, express f(x) in the forım: Rcos (x-2). Where R > Oand 0 <1<. Hence find the general solution of the equation: f(x) = 3 !! sin 2x+sin 4x ii) Prove that: = tan 2x. Hence find the general solution of the equation: 1+cos 2x+cos 1x 1+cos 2x+cos 4x =D 0. sin 2x+sin 1x 34 Express cosx+ V3 sin x in the form R cos (x -A), where R> 0 and 0 <2 < Hence find (a) The general solution of the equation cosx + V3 sin x = V3 (b) The maximum and mininium values of cosx + V3 sin x + 2( 95. (i) show that: sin 0+sin 20 = tan 0 1+cos 0+cos 20 (ii)Find the general solution of the equation sin 4x + cos 2x = 0 %3D (iiSolve for x ,where0" <x the equation sin 3x + cos x 0 41
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