Math, asked by amipatel1897, 11 months ago

21. Evaluate : cos( 70 degree ) / sin ( 20 degree ) = cos ( 59 degree ) × cosec (31 degree ).

Answers

Answered by muskan610

2

Answer:

answer is 1

Step-by-step explanation:

sin(90-0)=cos0

Answered by amandeepbahra

6

Answer:

Step-by-step explanation:

cos70/sin20 = cos59*cosec31

=> cos70/sin(90-70) = cos59/sin31

=> cos70/cos70 = cos59/cos59

=> 1=1

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