dereklilgoat
26.10.2019 •
Mathematics
Your teacher is giving you
test, worth 100 points
containing 40 questions.
there are two-point and
four-point questions on the
test. how many of each type.
of question are on the test?
Solved
Show answers
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Ответ:
30 2 points = 60 points
10 4 point questions and 30 2 point questions
Ответ:
Option A is correct.
Step-by-step explanation:
We are given
sin∠X = cos∠Y
And value of ∠X= 72°
we need to find value of ∠Y
Putting value of ∠X in the given equation
sin∠X = cos∠Y
sin(72°) = cos∠Y
=> cos∠Y = 0.951
Now we take cos^-1
∠Y = cos^-1(0.951)
∠Y = 18.01 ≈ 18°
So Option A is correct.