Verify the Identity $\frac { 1 - \sin t } { \cos t } + \frac { \cos t } { 1 - \sin t } = 2 \operatorname { sect }$

Q70: Write the given expression in terms

Q71: Write the product as a sum.

Q72: Use an addition or subtraction formula

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Q74: Use a half-angle formula to find

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Q77: Use an addition or subtraction formula

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Q80: Use an addition or subtraction formula