Verify that the equation is an identity.sin = -cos ?

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sin  = sin  cos ? - cos  sin ? = (-1) ? cos ? - 0 ? sin ? = - cos ?

Mathematics

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Solve the problem.When the Scott Pearson Company's stock increased in value from $100.00 per share to $125.00 per share, the company reported to its shareholders that their stocks had increased in value by  The stock price remained fixed at $125 for a few months, but then it fell back down to $100.00 per share. At that time, the Scott Pearson Company reported to the shareholders that the stock had decreased by  Since the price increase and decrease are exactly the same, should not the percent increase and the percent decrease be equal? Explain.

What will be an ideal response?

Mathematics

Use the figure below to answer the following question(s). Which graph has an Euler circuit?

A. Graph 3 B. Graph 4 C. Graph 1 D. Graph 2 E. none of these

Mathematics

Solve the problem.The price p of a certain product and the quantity sold x obey the demand equation p = - x + 200, 0 ? x ? 300. Suppose that the cost C of producing x units is C =  + 800. Assuming that all items produced are sold, find the cost C as a function of the price p.

What will be an ideal response?

Mathematics

The pitch of a roof is the ratio of the rise to the half-span. If a roof has a rise of 16 feet and a span of 56 feet, what is the pitch? ?

What will be an ideal response?

Mathematics