Use a double-angle formula to find the exact value of the given expression. 2 cos ²112.5° -1 2 cos ²112.5° -1 = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

Q: Solve the following for 0, in radians, where 0 ≤ 0 < 2л. Select all that apply: 5 cos² (0)-8 cos(0)…

A: given equation is :-5cos2θ-8cosθ+2=0where  0≤θ≤2πthen we have to solve it

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Q: 13. A cruise ship travels 300 miles due east before turning 30° north of east. along its new course.…

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Q: Given that cosa=8/17 and a is in Quadrant IV and sinb=-1/2 and b is in Quadrant III, find cos(a+b)?

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Q: 11. Solve for angle C of the oblique spherical triangle ABC given a= 80 degree c = 115 degree and…

A: a=80∘c=115∘A=72∘  To solve for angle C of the oblique spherical triangle ABC.

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A: Let horizontal distance denoted by x Let vertical distance denoted by y Let angle of depression…

Q: Find the exact value of the expression given below. cos(15)

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A: Since you have asked multiple question, we will solve the first question for you. If you want any…

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Q: VERIFY THE IDENTITY Sin(A+B) Sin(A-B) = Sin^2 A-Sin^2B

A: We shall be using the following identity in the required proof:sin2x+cos2x=1

Q: Solve the following for 0, in radians, where 0 ≤ 0 < 2л. 5 cos² (0)-8 cos(0) + 2 = 0

A: given equation is :-5cos2θ-8cosθ+2=0where  0≤θ≤2πthen we have to solve it

Q: Find cot-1 3: Step 1: cot-1 3 = x  Step 2: cot ?? = 3 Step 3: tan x = ?? Step 4: x = ??-1??…

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Q: Find all values of 0 if 0 is in the interval [0°,360°) and has the given function value. sin 0…

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Q: Fill in the blanks to complete the fundamental identities. cot() = COS () 00

A: We need to fill in the blanks to complete the fundamental identities.

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A: Given that CDE is a triangle

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Q: Verify that the equation is an identity. cos sin secß csc ß =csc²B-cot²B Both sides of this identity…

A: formula used are (i)  cosx=1secx(ii)  sinx=1cscx(iii)  sin2x+cos2x=1(iv) cotx=cosxsinx

Q: Use the Half-Angle Identities to have an exact value for each of the following (use simplified…

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Q: Verify the identity. cos csc 0• tan 0= 1 Which of the following four statements establishes the…

A: formula used (i) cscθ=1sinθ(ii)  tanθ=sinθcosθ

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A: Given :

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A: Given that we need to find all solution of  the equation  Sin 2x + cos x = 0               ( in…

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Q: Where do the graphs of f(x)=sin a b с d 45° and 135° 90° and 270° 225° 315⁰ NIX and g(x)=√2-sin…

A: Trigonometric Equations

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Q: 1. Which statements accurately describe standard position angles? Select all that apply. In standard…

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Q: answer to #2

A: sinθ=-0.05

Q: Use the figure to find the exact value of the following trigonometric function. cos (2x) 6 8 8

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A: Consider the triangle

Q: Write each expression as a single trigonometric function. sin (6x) cos(3x) - cos(6x)sin (3x) =

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Q: Answers the following: a) If 770 + 2x/5 = Arccos(sin x/4), find x. b) Evaluate tan(Arccos 12/13 –…

A: According to the company policy we can attempt only one question so please upload the questions…

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Q: Let a and 3 be first quadrant angles with cos(a) — VII, and sin(3) Find sin(a+B). 8)-√5. =

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A: In diagram, given that the vector passing through the point (2,3) and (-1,-4) To determine magnitude…

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