Mathematics · Trigonometry
A 10 inches long pencil AB with mid point C and a small eraser P are placed on the horizontal top of a table such that PC = √5 inches and ∠PCB = tan-1(2). The acute angle through which the pencil must be rotated about C so that the perpendicular distance between eraser and pencil becomes exactly 1 inch is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1tan-1(1)
- 2tan-1(43)
- 3tan-1(12)
- 4tan-1(34)✓
Correct answer
tan-1(34)
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