Answer:
Tan 33. Tan 40. 1. cot(90-50). cot(90-57)
=Tan 33. Tan 40. 1. Cot 33. Cot 40
=Tan 33×1/Tan 33 × Tan 40×1/Tan 40
=1
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Answer:
Tan 33. Tan 40. 1. cot(90-50). cot(90-57)
=Tan 33. Tan 40. 1. Cot 33. Cot 40
=Tan 33×1/Tan 33 × Tan 40×1/Tan 40
=1