Question

find the value of sec(-1410)​

Answer 1

sec ( - 1410 )

we know that sec (- theta) = sec (theta)

so ,sec (-1410) = sec ( 1410)

Now,

sec (1410) = sec (16 × 90 - 30) = sec 30

sec 30 = 2 / root 3

so, sec ( 1410 ) = 2 / root 3

Hope it helps you

thanks