Use the Fundamental Identities to Change the Expression to One $\sec ^{2} x-\frac{\sec ^{2} x}{\csc ^{2} x}$

question 7

Essay

Use the fundamental identities to change the expression to one involving only sines and cosines. Then simplify. Show all your steps.
$\sec ^{2} x-\frac{\sec ^{2} x}{\csc ^{2} x}$

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