Question

Q. 3. If A + B = 90° and sec A = 5, then find the value
of cosec B.
R[Board Term-1, 2016, Set-ORDAWEZ)​

Answer 1

Answer:

hey mate

A + B = 90°

A = 90° - B

sec A = 5

sec (90° - B) = 5

cosec B = 5

Hence, cosec B = 5

Step-by-step explanation:

We have used identity,

sec(90 - x) = cosec x

hope it helps you

Answer 2

Answer:

5/3

Step-by-step explanation:

A+B = 90 degree

And Sec A = 5/3

So we can put

 

                A = 90 - B

Thus putting in Sec A we get

                Sec (90 - B)  = 5/3

According to Trigonometry identity

we know

                Sec(90 - x) = Cosec x

Thus applying the same here we get

                Cosec B = 5/3

Thus value of Cosec B = 5/3