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a double angle_ Identity to Lind the exact cos x = - = // and II LALIT valve cos x = -5/55 4 tan (2x)= 11. Using CSC (2x)= Cos (2x)= sec (2x) Cot (2x)= sin (2x): = "

a double angle_ Identity to Lind the exact cos x = - = // and II LALIT valve cos x = -5/55 4 tan (2x)= 11. Using CSC (2x)= Cos (2x)= sec (2x) Cot (2x)= sin (2x): = "

Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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Number 11
7. Use a exact value of sin ( -reference angle 3 12 8 Use a half angle identity → sinl TT 4 -)sin (1) sin (1) cos (#2) + (Os Sin I -> 34 2 9. solve the equation for 0<x<2T -5-13cosx COS2 = -2 NOT POSSIBLE -5= πT + 3 Cost - 3 costante NO SOLUTION 10. Solve the colution for x over 0 < x < 2 πT 2 sin²x - 3sinx+1=0 (-3) = √(-0) ²-a (2) (1) 25 in 2x - 35₁nx+1=0 → Sinx = sinx 311 sin x 2 →→sinx=1 & sinx==2 4 s 414 1. I₁ ST → x = = = 50 T STL Ex-2 & x < 11. Using a double angle Identity to kind the exact Cos x=-=// and II LALIT 4 valve tan (2x)= secx Cos(x) sin(x) (os(x) CSC (2x)= COS (2x) sec (2x) Cot (2x) sin (2x): 2. verify the trig function: cosx (1 + +an²x) Cos(x) (1 + tan² (x)) → (1 + +an² (x)) cos(x) -> sin = (1 + ((05 (2)) ³) cos (x) implify: = = sec (x) → TRUE - = N3 15
Transcribed Image Text:7. Use a exact value of sin ( -reference angle 3 12 8 Use a half angle identity → sinl TT 4 -)sin (1) sin (1) cos (#2) + (Os Sin I -> 34 2 9. solve the equation for 0<x<2T -5-13cosx COS2 = -2 NOT POSSIBLE -5= πT + 3 Cost - 3 costante NO SOLUTION 10. Solve the colution for x over 0 < x < 2 πT 2 sin²x - 3sinx+1=0 (-3) = √(-0) ²-a (2) (1) 25 in 2x - 35₁nx+1=0 → Sinx = sinx 311 sin x 2 →→sinx=1 & sinx==2 4 s 414 1. I₁ ST → x = = = 50 T STL Ex-2 & x < 11. Using a double angle Identity to kind the exact Cos x=-=// and II LALIT 4 valve tan (2x)= secx Cos(x) sin(x) (os(x) CSC (2x)= COS (2x) sec (2x) Cot (2x) sin (2x): 2. verify the trig function: cosx (1 + +an²x) Cos(x) (1 + tan² (x)) → (1 + +an² (x)) cos(x) -> sin = (1 + ((05 (2)) ³) cos (x) implify: = = sec (x) → TRUE - = N3 15
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