Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The terms tan 80°, tan 70° + tan 10° and tan 10° are in
Text Solution
Verified by ExpertsThe correct answer is:
A
arithmetic progression
tan 80° = tan (70° + 10°) 
tan 80° - tan 80° tan 70° tan 10°
= tan 70° + tan 10°
tan 80° - tan80 0 - tan 70° cot80 0 = tan 70° + tan 10°
tan 80° = 2 tan 70° + tan 10°
tan 80° + tan 10° = 2 (tan 70° + tan 10°)
they are in A. P.
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