Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · TrigonometryMedium · 45s
If cos₂x + cos₄x = 1 then tan₂x + tan₄x = ?
TopicTrigonometry
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Final Answer: Option D — tan₄x