SECT 30. Show that a2 + b2 + c² = 2(bc cos A + ac cos B + ab cos C) in a triangle with sides whose lengths are a, b, and c, with corresponding angles A, B, and C opposite those sides.

Q: 1) Use the given right triangle to find cos A. 1) 12 A 16 C 4 A) cos A = 3 3 B) cos A = 3. C) cos A…

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Q: 3. Two equations about interior angles in n-gons are given here. a. Explain what each one…

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Q: 7. Jogger A and Jogger B start at the same point. Jogger Atravels 0.9 mi due east, then turns 120°…

A: Given that jogger A and jogger B starts at the same point. Suppose their starting point be named O.…

Q: 9) 10) E U 3x+ 6 42° F 61° R 18x-7

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Q: Two points are speci 9) (2, 90°), (4, 180°) (4,180

A: As per bartleby guidelines one question should be solved once, so please upload each question…

Q: 3.- De la figura, calcular "a°+Bo" Bo 40° За%

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Q: Find a · b, Ja| = 8, |b| = 3, the angle between a and b is 2t/3

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Q: Two sides of a regular pentagon are produced fo form angle x .what is x?

A: Given , Two sides of a regular Pentagon are produced to form an angle x We need to find x The…

Q: 9) Use the given right triangle to find cos A. B 6. A 4 A) cos A 3. 3. C) cos A = = 4 %3D B) cos A…

A: Given right angle triangle

Q: In Figure 4.36, AB || DC and AD = BC. a) Find the measures of the angles of ABCD if mZA = 12x + 30…

A: a) ABCD is an isosceles trapeziam. So we have ∠D=∠C=z (say). We know that ∠A and ∠D are…

Q: State and prove the converse of the corresponding angles theorem.

A: State and prove the converse of the corresponding angles theorem.

Q: Q.4) If a = 3i+j-k, b=2i-j+kand c 5i + 3k, find (2 a +b).c.

A: According to our guidelines, In case of multiple questions we are supposed to answer the first…

Q: 15. Determine the value for the variables x and a and all angle measures in the 58° 587 58+58=116…

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Q: (14x-6)° 44°

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Q: What is the angle between the planes 3x + 2y + 4z = 4 and 3x -y+2z = 1 to the nearest degre %3D O…

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Q: 12. If a b = √3 and a × b = (1,2,2), find the angle between a and b.

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Q: 4. AB intersects CD at E. If the mLAEC is 8x- 15 and mLAED is 9x + 76, find all the angles.

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Q: Which of the following angles are co-terminal to -TT/2?

A: Given Data: Angle: θ=-π/2 Add 2π in the given angle, θ1=θ+2π=-π/2+2π=-π+4π2=3π2

Q: A 9. If angles P and Q are complementary, which statement about the two angles is true? O ZP and 2Q…

A: the objective is to select the correct option

Q: 2) cos A B. 16 12 20

A: Given,         A right triangle ABC is shown below :

Q: 8. If LA and ZB are complementary angles, mZA (2r +11) and m/B = (10x- 17), find mLA. %3D

A: Two angles are said to be complementary it their measures add to 90 degrees.

Q: 1. Find measure angle ABD. (3х - 2)° (5x-14)

A: A rectangle is a parallelogram , all properties of parallelogram apply .

Q: Exercise 1.12. Determine the cosine of the angles of the triangle whose vertices are A = (2,-1, 1),…

A: We can find the length of all the three sides then with the help of cosine rule of triangle we will…

Q: 6) Use the angle addition postulate to solve for x and then finc MLADC = (9x - 80)° (x-9) B (5x+1)D

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Q: 6. If A,B and C are interior angles of a triangle ABC, then show that B+C sin A = cos

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Q: c) csc. Απ 3 c)

A: Step 1:

Q: 2-7, Use the diagram at right and fill in the blanks with Zx, ZY or ZZ 16 16 2. cos 3. sin 34 34 34…

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Q: What is the angle between A and B, if A = 3.0 i +5.0j and B = -3.0 i +7.0 j. Equation: A.B=AB cos 0

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Q: 30. In right triangle ABC with C = 90°, AB = 10 and BC = 8. What is cos A? 4 3 4 3 а. b.- 5 d. - 4…

A: Option B is the correct answer. Pythagorean theorem must be applied to find out unknown side length…

Q: E) 1) If /1 and 2 are complementary 2) If 25 and Z6 are complementary 3) If 28 and 9 are…

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