When multiplying 0.9 X 4 you must turn the 4 into a 4.0 and then line up the decimal points
1 answer:
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Answer:
Step-by-step explanation:
In each case, draw the right triangle which produces the inverse trig value. That is, label the two sides as needed, and calculate the third side.
It should be clear that
sin(2α) = 2 sinα cosα
So,
See what you can do with the others.