Limits, Continuity & Differentiability
General
Grade 12
Question:
<p>limx→π/4
cot3 x−tan x
cos(x+π/4) is equal to:</p>
Step-by-Step Solution
Key Concept: General
<p><strong>1</strong>: Let x = \pi/4 + h. Denom = -h. Numer = (1 -2h)3 -(1 + 2h) = -8h.</p><p><strong>2</strong>: Limit = 8.</p>
Correct Answer: (3)