Lim x→0 sec4x-sec2x/sec3x-secx=
Question
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Lim x→0 sec4x-sec2x/sec3x-secx=

1) 3/2

2) 2/3

3) 1/3

4) 3/4

JEE/Engineering Exams
Maths
Solution
75
Rating
4.0 (1 ratings)
Lim x→0 sec4x-sec2x/sec3x-secx=
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Lim  x0            sec4x-sec2xsec3x-secx   lim 4sec4x tan4x-2sec2x tanx3sec3x tan3x-sec tan     lim 44sec34x-23sec32x33sec3x-sec3x = 44-2×23×3-1 = 16-48=128=32

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