ΔDEF is right angled at E. If ∠F = 30°, then ﬁnd the value of (c – McqOptions

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1.	ΔDEF is right angled at E. If ∠F = 30°, then ﬁnd the value of (cos D – 1/√2).
A.	-1/2
B.	(√6 – 1)/√3
C.	(√2 – 2)/2√2
D.	√3 – 2
Answer» D. √3 – 2

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