Question

`if \: x = 1 - \sin( \alpha ) \: and \: y = 1 + \cos( \alpha ) \\`

Express y in terms of x and alpha only
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Answer 1

A sample of helium was compressed at 35 °C from a volume of 0.5 L

to 0.25 L where the pressure is 500 mmHg. What was the original pressure?

Explanation: