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3 years ago

Please help. Sine and Cosine rules

Mathematics

1 answer:

kodGreya [7K]3 years ago

3 0

Answer:

a=41.8 BC=2.8

Step-by-step explanation:

sin30/6=sinx/8

8*sin30=6sinx

4=6sinx

sin^-1(4/6)

angle a

cosine rule

bc^2=3^2 +5^2-2(3)(5)*cos30

BC^2= $\sqrt8.019237886\\$

BC=2.83

2.8

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5905.9 ft

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3 years ago

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3 years ago

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3 years ago

A sprinter who weighs 706 N runs the first 5.5 m of a race in 1.6 s, starting from rest and accelerating uniformly. What are the

zhenek [66]

Answer:

(a) Speed = 6.875 m/s

(b) Kinetic Energy = 1.70 kJ

Step-by-step explanation:

Given:

d = 5.5 m

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Part (a)

Using the equation of motion with the assumption of zero initial speed:

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$KE = \frac{1}{2} mv^{2}$

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$KE = 1701.56 J = 1.70 kJ$

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3 years ago

Find the length of CD

zhuklara [117]

Answer: CD=18

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1) (3/x)=(4.5/(x+6)), cross multiply and solve for x
2) 6x+36=9x
3) x=12
4) Solve for CD
5) (12)+6=18

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3 years ago