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DEF is right angled at E If D = 45 then...

This question belongs to Arithmetic Ability Circular Measurement Of Angle
Circular Measurement of Angle
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ΔDEF is right angled at E. If ∠D = 45°, then what is the value of cosecFcotD?

Answer & Solution
Correct Answer: Option D
Circular Measurement of Angle mcq question image
$$\eqalign{ & \Rightarrow {\text{cosec F}} \times \cot {\text{D}} \cr & = {\text{cosec 4}}{{\text{5}}^ \circ } \times \cot {45^ \circ } \cr & = \sqrt 2 \times 1 \cr & = \sqrt 2 \cr} $$
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