tan 10°. tan 20°. tan 30°. tan 40°. tan 50. tan 600. tan 70°. tan 80° = 4) 3 1) 0 2) 1 3) 2
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Answer:
tan 10°= cot(90-80)
similarly tan 20 = cot(90-70)
cot(90-θ) = 1/tanθ
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