Math, asked by reddyrahul5616, 1 year ago

Evaluate cosec 30sec51 - tan51cot 39

Answers

Answered by mysticd

8

Answer:

1

Step-by-step explanation:

Cosec39sec51-tan51cot39

= Cosec(90-51)sec51-tan51cot(90-39)

= Sec51×sec51 - tan51 × tan51

= Sec² 51 - tan² 51

= 1

[ Since , sec²A - tan²A = 1 ]

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