Question

Evalute==>sec 50° sin 40° + cos 40° cosec 50°​

Answer 1

Answer:

Step-by-step explanation:

secA =1/cosA..........(1)

cosecA=1/sinA.............(2)

sec(90 - A) = cosecA............(3)

cosec(90 - A) = secA............(4)

therefore,

sec50 = cosec(90-50) = cosec40

similarly,

cosec50 = sec(90-50) = sec40

now,

from question

=(sin40cosec40)  +  (cos40sec40)

= (1) + (1)

=  2

THANK YOU !!!