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Question

Find the value of
sin 43 × 1cos 47 × sec 63 × 1cosec 27

A
sec263
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B
cosec 27
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C
1
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D
2
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Solution

The correct option is C 1
sin 43 = sin (90 47) = cos 47
and
sec 63 = sec (90 27) = cosec 27


sin 43 × 1cos 47 × sec 63 × 1cosec 27

=cos 47×1cos 47×cosec 27×1cosec 27

=1

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