Math, asked by sensourav67999, 11 months ago

sec 70° sin 20° - cos 20°cosec 70°

Answers

Answered by nimratkaur2907

23

Answer:

Sec 70° sin 20 - cos20 cosec70

= cosec(90-70) sin 20 - cos20 sec(90-70)

= 1/sin20 x sin 20 - cos 20 x 1/cos20

= 1 - 1

= zero

HOPE IT HELPS! ❤

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