cosA cosB cosc 7) Use the Law of Cosines to prove the following identity z° +z9 +zD a b 2abc

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A: In RAngles and lengths about Diagonals are symmetrical in Rhombus.

Q: If the triangle below is rotated 90° counterclockwise, which of the following coordinates is…

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Q: number of rotations it takes to find the coterminal angle of 1670°1670°  between [0, 360°]

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Q: Find x and y using either the 45-45-90 triangle theorem or the 30-30-60 triangle theorem.

A: The objective of the question is to find the values of x and y in a triangle with angles 30°, y, and…

Q: Boat 1 is 670 yards from Boat 2. Boat 2 is 240 yards from a lighthouse. The angle formed between…

A:

Q: Given the ordered pair P(-7, 24), determine the requested sine, cosine, or tangent of angle 0. cos 0…

A: On solving this we will get

Q: Given v= 10i-j and w=-i-10j (a) find the dot product v. w; (b) find the angle between vand w. (a)…

A: Given v = -10i - j and w = -i- 10j (a) We have to find the dot product v. w(b) We have to find the…

Q: ormation a. Simplify: (1¹¹ - 2i5)² – (3i³)³ – 2i6 + i (1/45°)(3/60°)

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Q: We can now use reflection to find many other points! What would the coordinates of 315° be? Submit…

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Q: (a) Find the dot product v. W. v = −4i + 6j – k w = 3i + j - k (Express numbers in exact form. Use…

A: v=-4i +6j -k and w=3i +j -kthen v.w=(-4×3)+(6×1)+((-1)×(-1))=-5

Q: 14A 25- foot extension ladder learning against Luilding mahes a oround. How a 76° angle with the for…

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Q: culate √2-4i. Give your answer in a + bi form. In polar form, use the angle 0 < 2TT.

A: Topic:- complex number algebra

Q: 2 In AABC, a point D is on AC so that AB = AD (Fig. 1-2). mLABC mZACB = 30. Find m/CBD. C 1-2 B

A: Given figure:-

Q: Given vectors A= 8i - 6k and B= 8i+2j+6k a) Cosine of the angle between A and B___________

A:

Q: 2a 4b Figure 3 Figure 3 shows the triangle OAB with ОЛ 1=2a and OB=4b (a) Find AB in terms of a and…

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Q: Determine a coterminal angle of 660°. 3 ㅇ플 2 ㅇ 5개 7π 4 117 6

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Q: Find the point of intersection of the terminal side of the angle 11 with the unit circl 6 Ⓒ (-1/2/3…

A: Solution:

Q: 6) (-2√2,2√2) 3 3√3 8) 2 10) (-2,-2√3)

A:

Q: A point P(1, 3, -5) is translated by 2i+3j-4k and then rotated counter clockwise by 90° about the…

A: Given a point P(1,3,-5) is translated by 2i^+3j^-4k^ and then rotated counter clockwise by 90° about…

Q: 5 tan( 59°)- use special triangles sec(59°)- 3sin (59°) 2.

A: Here we need to find the linear approximation of  5tan(59°)-2sec(59°)-3sin2(59°)   This question can…