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Acute A: tan A+cot A=10/3. What is the sum of squares of these two ratios?

A82/9
B118/9
C64/9
D100/9
Answer & Solution
Correct answer: A. 82/9
Squaring the sum and subtracting 2 tan A cot A = 2 gives 100/9 − 2 = 82/9.
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