Math, asked by Minukujur, 1 year ago

Tan1° tan11° tan21° tan69° tan79° tan89°=1
Without using trigonometric tables

Answers

Answered by KingAgr
12
tan(90-89) × tan (90-79)× tan (90-69) ×tan 69 ×tan 79× tan 89=1
cot 89 × cot 79 × cot 69 x tan 69 × tan 79 × tan 89=1
1/tan 89 × 1/ tan 79 ×1/ tan 69 × tan 69 × tan 79 x tan 89=1
1=1

Minukujur: thnx
KingAgr: wlcm
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