Question

If sin a is equal to 2 upon 5 find the value of 5 + 4 cot square A.

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

26

Step-by-step explanation:

Given :- sina = 2/5

coseca = 1/sina = 5/2

we have to find 5 + 4cot²a

we know , cosec²a - cot²a = 1

cot²a = cosec²a - 1

cot²a = (5/2)² - 1

cot²a = 25/4 - 1

cot²a = (25 - 4)/4

cot²a = 21/4

so, 5 + cot²a = 5 + 4×21/4

=> 5 + 21

=> 26

thanks,

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