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Chapter 3 Solutions
Algebra and Trigonometry
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- Students were asked to prove the identity (sec x)(csc x) = cot x + tan x. Two students' work is given.Student AStep 1:1/Cos x * 1/sin x = cot x + tan xStep 2: 1/cos x sin x = cot x + tan xStep 3: (cos^2 x + sin^2 x)/cos x sin x = cot x + tan xStep 4: cos^2 x/cos x sin x + sin^2x/cos x sin x= cot x + tan xStep 5: cos x/sin x + sin x/cos x = cot x + tan xStep 6: cot x + tan x = cot x + tan xStudent BStep 1: sec x csc x = cos x/ sin xStep 2: sec x csc x = cos^2x/cos x sin x + sin^2x/cos x sin xStep 3: sec x csc x = cos^2x + sin^2x/cos x sin xStep 4: sec x csc x = 1/cos x sin xStep 5: sec x csc x = (1/cos x), (1/sin x)Step 6: sec x csc x = sec x csc xPart A: Did either student verify the identity properly? Explain why or why not. Part B: Name two identities that were used in Student A's verification and the steps they appear in.arrow_forwardLet sinθ = 2√2/5 and π/2 < θ < πPart A: Determine the exact value of cos 2θ.Part B: Determine the exact value of sin(θ/2)arrow_forward1. Find the solution set of In(x) sin(x) ≤ 0, for x = [0,14].arrow_forward
- t 56 65 33arrow_forward7. From a point 20 m away on a level ground, the angle of elevation to the bottom of a the top of the window is 32°. Calculate the window is 27° and the angle of elevatim height of the window. (3 marks) 32 SOUCAHTOA Rom Coso-Adj opponite 1270 H X Hyp Tant=OPP Adj 20 # Zom Adjacent CoS2E 20 XHX Tanz 20 20 K -0.0445503261 -1.764201788 0-044550326 60044550320 (1 mark) 3960 8. All odd numbers from 1 to 10 are arranged in descending order to form a number. (i) Write the number. 35798. 97531 31 (ii) Write the total value of the second digit of the number formed in (a) (i) FA 7X1000-7000 이 (1 mark) 9. A cylinder has a diameter of 28 cm and the height is 18 cm. Calculate its volume. 2 22 × 14 × 14 × 18 -110880m 3 (3 marks) 10. The figure below shows a right pyramid with AB = 3 cm, BC = 5 cm, and AV VC = VD = 4 cm. Draw its net. V 3+ 12 7/18 (2/20 2105 SSS 20arrow_forwardFind the exact values of sin(2u), cos(2u), and tan(2u) given 2 COS u where д < u < π. 2arrow_forward
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