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प्रश्न
Prove that:
tan (55° - A) - cot (35° + A)
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उत्तर
tan (55° - A) - cot (35° + A)
= tan [90° - (55° - A)] - cot (35° + A)
= cot (90° - 55° + A) - cot (35° + A)
= cot (35° + A) - cot (35° + A)
= 0
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