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evarod
15.10.2019 •
Mathematics
Write the ratios for sin a and cos a. need .
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Ответ:
Your answer would be C, Sin A= 3/5 cos A= 4/5
Step-by-step explanation:
Remember Soh-cah-toa
Soh stands for sin= opposite/hypotenuse
Cah stands for cos= adjacent/hypotenuse
Toa stands for tan= opposite/adjacent
Ответ:
Fraction = 4/7
Step by step Explanation
Let the denominator be x.
Numerator = 3 less than denominator
denominator = x
Numerator = (x – 3)
Now, Adding 5 to denominator
adding 2 to numerator.
Numerator = (x – 3 + 2)
Denominator = (x + 5)
(x – 3 + 2)/(x + 5)
According to the question
(x – 3 + 2)/(x + 5) = 1/2
(x – 1)/(x + 5) = 1/2
2(x – 1) = 1(x + 5)
2x – 2 = x + 5
2x – x = 5 + 2
x = 7
So,
=> Denominator x = 7
=> Numerator (x – 3) => (7 – 3) = 4
= > Fraction = 4/7