Select the correct answer. 1+cos45 2 Rewrite using a half-angle identity. O A. sin22.5° Ов. о в. соз22.5° OC. sin90° O D. cos90°

Q: Evaluate without using a calculator.      cos  (cos    -1 5/13)

A: coscos-1513

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A: Given: 4cos2x=5-4sinx we know that cos2x=1-sin2x                                         ..1

Q: Divide. Leave your answer in trigonometric form.   15(cos 75° + i sin 75°) 3(cos 40° + i sin 40°)

A: Given complex numbers are We know that Therefore, given complex number can be written as

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A: We have to find the cos angle

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A: We have the trigonometric identity sin2x+cos2x=1

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A: Given:             cos−1(0.93)

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A: We will solve the following.

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Q: Find the exact value of the given expression without using a calculator. Be sure to include the…

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Q: Use a half-angle identity to find the exact value. cos 15° cos 15° (Simplify your answer, including…

A: Topic = Trigonometry

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Q: 6. Evaluate S* VI-* d* using trigonometric substitution.

A: Evaluate using trigonometric substitution

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A: The given angle  = 200°

Q: If 6sin theta=5 and cos theta < 0,find ,without a calculate the value of 1-2cos2 theta

A: Given:  To Find: Value of  Concept Used:

Q: Divide. 12 (cos ()+i sin (=) 77 77 4V6(coo(푸) +1 sin(푸)) 37 37 Enter your answer by filling in the…

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Q: If tan x=2/5, and pi<=x<=3pi/2, determine the exact value of cos 2x. Fully simplify your answer.

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Q: Find the exact value of the expression. V3 tan arccos -(- ) V3 (Type an exact answer, using radicals…

A: Given information:-

Q: 9 If 180° tan O Cesson 4 B. cos - tan 0

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A: As per bartleby guidelines we only give first three questions answers.

Q: Solve the equation for x if 0 ≤ x < 2?. Give your answer in radians using exact values only. (Enter…

A: We will find the value of x using trig identity and algebra as following.

Q: Simplify 1+sin2x+cos2x/cosx

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Q: Find cos2 theta if sine theta= 16/65

A: We know that

Q: How do I find sin Q, cos Q, and tan Q with these values: p = 12 q = 35 r = 37

A: The figure of a triangle with side lengths p = 12, q = 35, r  = 37 is  To evaluate : The values of…

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A: Given expression :

Q: Remember, even if you enter an answer rounded to a set number of decimal places, if you use that…

A: we have been given a triangle ABC, in which ∠A=36.3° , a=186.2 and b=246.1 we have to solve the…

Q: Assume that cos\theta =-(1)/(3) and \pi <\theta <(3\pi )/(2),  find the exact value of sin2\theta

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Q: Substitute x=5 sin 0 in the expression 25 x2 | and simplify. TT Assume that 0 < e < 2 cot 0 O 5 cos…

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Q: 18. Subtract and simplify cos0–1 sine sine cose–1

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Q: Assume that cos\theta =-(1)/(3) and \pi <\theta <(3\pi )/(2),  find the exact value of cos(\theta…

A: As we know that cosa-b=cos(a)cos(b)+sin(a)sin(b)

Q: Assume that cos\theta =-(1)/(3) and \pi <\theta <(3\pi )/(2),  find the exact value of cos2\theta

A: Given that,   cosθ=-13 and π≤θ≤3π2

Q: Determine whether the positive or negative square root should be selected. 1+ cos 45° cos 22.5° = ±…

A: topic- trigonometric functions

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Q: Find (4 – i)" by first changing 4 – i to trigonometric form ( with 0 in radians), rounding to 4…

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Q: Find the exact value by applying the double or half angle identities: √1-cos(-30°)/2

A: Explained below

Q: Why do you think it is usually preferable to start with the side containing the more complicated…

A: Use identity to solve

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A: we have to find the value of cos2arctan-125

Q: using your calculator, determine sin2 + cos3 – tan4.

A: Givensin2+cos3-tan4

Q: Assume that cos\theta =-(1)/(3) and \pi <\theta <(3\pi )/(2), find the exact value of sin\theta

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Q: Find the exact value of the given expression without using a calculator. Be sure to include the…

A: *concept:- cos(2nπ - ¥) = cos¥.

Q: What is the exact value of cos (-112.5°) using the half-angle identities? 2+v2 2 /2-/2 2-/2 /2+v2

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Q: 23.  If 0∘<θ<90∘ and sin⁡θ=1213, find cos⁡θ using trigonometric identities.

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Q: Step 2 Simplify the right side. sin? 70 V cos 70 sin 70 d0 = cos/2 70 - COS 70 sin 70 de Submit Skip…

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Q: Solve the equation for x if 0 ≤ x < 2?. Give your answer in radians using exact values only. (Enter…

A: Known fact: cos2θ=1-2sin2θ   The given equation is 2cos2x-sinx-1=0. Solve the above equation as…

Q: Solve for θ if −6sinθ+4=3√3+4 and 0≤θ<2π. Enter your answer(s) in radians. If necessary, separate…

A: Please refer the attached image for complete solution.

Q: Convert the first expression to the second expression. 1. (1 – sine) (1 + cos 0) ; cos²0 2. (csc B +…

A: Assuming beta not equals to zero, otherwise  cosec(0) does not exist