Q. 36 A4.5( 2 Votes )

# In each of the fo

Given:

f(x) is continuous at x = 0 & f(0) = 8

If f(x) to be continuous at x = 0,then,

f(0) = f(0) + = f(0)

LHL = f(0) =

cos(–x) = cosx

cos2x = 1–2sin2x

1–cos2x = 2sin2x

1–cos2x = 2sin2x

2k2

Since f(x) is continuous at x = 0 & f(0) = 8,then

2 k2 = 8

k2 = 4

k = ±2

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