Okay so a right angle is 90 degrees so we take 90 degrees and subtract 63 from it
90-63=17 degrees
so X=17
Then in order to find Y, we have to realize these are alternate interior angles so they equal the same
your equation is 3y=63
you divide y by 3 to isolate it and
Y= 21
Hope this helps:)
Answer:
A. -2sin(x)sin(0.4x)
Step-by-step explanation:
At x=0, the given expression evaluates to zero.
For x near zero, the given expression is slightly negative. You know this because cos(1.4x) decreases faster than cos(0.6x), so their difference will be negative.
Of the answer choices, you can eliminate C and D because they are not zero at x=0. You can eliminate choice B, because it is positive for values of x near zero. The only viable choice is A:
-2sin(x)sin(0.4x)
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Of course, a graphing calculator can help you figure this out. See the attachment. The given expression is plotted using a solid red line; the answer choice A is plotted using blue dots.
Make sure your calculator is in Degree mode.
You’ll get your answer by adding +7 to each number.