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rodikova [14]
2 years ago
12

Given sinθ=4/7 and θ lies in Quadrant II .

Mathematics
1 answer:
AlladinOne [14]2 years ago
5 0

Answer:−√33/7


Step-by-step explanation:

Second quadrant implies cos negative, as cos is projection from

unit circle to x axis.

sin^2+cos^2=1

cos= sqrt(1-sin^2)

sin^2 = 16/49

1-sin^2 = 33/49

sin= -sqrt(33)/7

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Step-by-step explanation:

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2(-4x+3)

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How many grams of NH3 are required to produce 4.65 g of HF
nignag [31]

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Step-by-step explanation:

Balanced chemical reaction is written first to know the number of moles taking part in original reaction.

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Given:

mass of HF = 4.65

First the number of moles of HF in 4.65 grams is calculated by using the formula:

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putting the values in the above equation number of moles can be found.

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