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ankoles [38]
3 years ago
14

What's half an hour mean?

Mathematics
2 answers:
Inessa05 [86]3 years ago
7 0

Answer:

30 minutes

Step-by-step explanation:

ICE Princess25 [194]3 years ago
7 0

half an hour means 30 minutes

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Solve the triangle using the Law of Sines. (Assume a = 7.1, b = 2.9, and ∠A = 70°. Round the length to one decimal place and the
posledela

Answer:

sides

a=7 (rounded)

b=3 (rounded)

c=8 (rounded)

angles

A=70

B=22.57

C=87.43

Step-by-step explanation:

a .  given

b .  given

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A .  given

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C = 180° - A - B = 1.52593 rad = 87.43° = 87°25'47"

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Let x be sister

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8 0
3 years ago
2tan(45-A)/1+tan^2(45-A)=cos2a
AVprozaik [17]

Answer:

Let θ = (45 - A)°.

=> 2Tanθ/ 1 + Tan²θ

=> 2Sinθ/Cosθ / 1 + Sin²θ / Cos²θ

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=> 2Sinθ/Cosθ/ 1 / Cos²θ

=> 2SinθCos²θ/Cosθ

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=> Sin2θ

But we assumed θ = (45 - A)°,

=> Sin2(45 - A)

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=> Cos2A

= R.H.S

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Step-by-step explanation:

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