If sec θ.sin θ = 0, then the value of cos θ is
(a) 0
(b) 1/√2
(c) 1/2
(d) 1
Answer :
Sec A × sin A = 0
( 1/cos A ) × sin A = 0
( Sin A/Cos A ) = 0
tan A = 0
tan A = tan 0°
Therefore ,
A = 0°
Now ,
Cos A = Cos 0° = 1
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