3.1 Express cos (P+Q) in terms of trigonometric ratios of P and Q. 3.2 Hence, derive a formula, which expresses cos 2Pin terms of cos P. sin 2x-cos 2x+1 3.3 Given: sin 2x+cos 2x+1 sin 2x-cos 2x+1 sin 2x+ cos 2x +1 3.3.1 Prove that: tanx 3.3.2 Hence, evaluate tan 22.5°. (Leave your answer in SURD form). 3.4 Given the expression: sin 2x.cos 2x 3.4.1 Calculate the maximum value of the above expression. 3.4.2 Calculate the first negative yalue of x for which the expression has this maximum value

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter8: Complex Numbers And Polarcoordinates
Section8.4: Roots Of A Complex Number
Problem 42PS
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QUESTION 3
3.1
Express cos
(P+Q) in terms of trigonometric ratios of P and Q.
Hence, derive a formula, which expresses cos 2P in terms of cosP.
3.2
sin 2x-cos 2x+1
3.3
Given:
sin 2x+cos 2x +1
3.3.1 Prove that:
sin 2x-cos 2x-+1
= tan x
sin 2x+ cos 2x +1
3.3.2 Hence, evaluate tan 22,5°. (Leave your answer in SURD form).
3.4
Given the expression: sin 2x.cos 2x
3.4.1 Calculate the maximum value of the above expression.
3.4.2 Calculate the first negative yalue of x for which the expression has this
maximum value
QUESTION 4
cos 195°.cos 285°
4.1
Simplify
cos(60°-x)cos x-sin(60° – x)sin x
cos(x-360)-tan(180° -x)sin(360° - 2x)cos x
sin(90° + x)
cos 2x
4.2
Prove:
DOME
sin xcosx
= tan 2x
4.2.1 Prove:
10os' x-sin x
4.2.2 Determine for which values of x,xe 0°360° is the identity in
undefined?
4.3
Determine the general solution: tanx.sin.x+cos x.tanx 0.
Transcribed Image Text:QUESTION 3 3.1 Express cos (P+Q) in terms of trigonometric ratios of P and Q. Hence, derive a formula, which expresses cos 2P in terms of cosP. 3.2 sin 2x-cos 2x+1 3.3 Given: sin 2x+cos 2x +1 3.3.1 Prove that: sin 2x-cos 2x-+1 = tan x sin 2x+ cos 2x +1 3.3.2 Hence, evaluate tan 22,5°. (Leave your answer in SURD form). 3.4 Given the expression: sin 2x.cos 2x 3.4.1 Calculate the maximum value of the above expression. 3.4.2 Calculate the first negative yalue of x for which the expression has this maximum value QUESTION 4 cos 195°.cos 285° 4.1 Simplify cos(60°-x)cos x-sin(60° – x)sin x cos(x-360)-tan(180° -x)sin(360° - 2x)cos x sin(90° + x) cos 2x 4.2 Prove: DOME sin xcosx = tan 2x 4.2.1 Prove: 10os' x-sin x 4.2.2 Determine for which values of x,xe 0°360° is the identity in undefined? 4.3 Determine the general solution: tanx.sin.x+cos x.tanx 0.
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