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Damm [24]
3 years ago
14

Given cosx= 4/5 when (3π/2) < x<2π find sin2x

Mathematics
1 answer:
jarptica [38.1K]3 years ago
8 0

Answer:

D -24/25

Step-by-step explanation:

sin(2x) = 2sin(x)cos(x)

cos(x) = ⅘

sin²(x) = 1 - cos²(x) = 1 - (⅘)²

sin²(x) = 9/25

sin(x) = -⅗

(Because 4th quadrant)

sin(2x) = 2(-⅗)(⅘)

= -24/25

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find two numbers, both smaller than 100, that have common multiple of 450 and highest common factor of 15
Alex_Xolod [135]

Answer:

hello :

90 = 15×6

75 =  15× 5

highest common factor of 90 and is 15 because highest common factor of 5 and 6 is 1

90 = 3² ×2×5

75= 5^3

common multiple of 90 and 75 is : 3²×2×5²  = 450

90 and 75  both smaller than 100.



3 0
3 years ago
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If we work it through:

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The set of order pairs (-1, 8), (0,3) (1,2) and (2, -7) represent a function. What is the range of the function?
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------------------------------------------------------------------------------

Explanation:

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