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प्रश्न
If tan A = cot B, prove that A + B = 90°.
सिद्धांत
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उत्तर
∵ tan A = cot B
tan A = tan (90° – B)
A = 90° – B
A + B = 90°. Proved
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पाठ 18: Trigonometric Ratios of Some Standard Angles and Complementary Angles - Exercise 18C [पृष्ठ ३८०]
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