Answer:
Step-by-step explanation:
Bernard is organizing a dinner for 28 students. The costs for each part of the dinner are shown. Bernard thinks the event will c
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Pythagorean theorem is 
and using that sin is opposite/hypotenuse, you can find the third side of the triangle.
now you know adjacent is 60, so cos=60/61
and using that sin is opposite/hypotenuse, you can find the third side of the triangle.
now you know adjacent is 60, so cos=60/61