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

Q: The diagonals of rhombus ABCD intersect at E. Given that m/BAC=53° , DE = 8 , and EC=6 , find m/DAC…

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…

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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: (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___________

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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

A: