Question

Express sec 51 degree + cosec 25 degree in terms of trigonometric ratios of angle between zero degree and 45 degree​

Answer 1

Given: The term sec 51 degree + cosec 25 degree

To find: Express the above term in terms of trigonometric ratios of angle between zero degree and 45 degree​.

Solution:

• Now we have given the term sec 51 degree + cosec 25 degree.

• Now we can writ 51 as (90 - 39), so:

                   sec (90 - 39) degree + cosec 25 degree   .......(I)

• Now we know the formula:

                   sec ( 90 - x ) = cosec x

• So applying this in (I), we get:

                   cosec 39 degree + cosec 25 degree

Answer:

               So sec 51 degree + cosec 25 degree can be express in terms of trigonometric ratios of angle between zero degree and 45 degree​ as :

cosec 39 degree + cosec 25 degree

Answer 2

Answer: cosec39 + cosec25 degree