Find the value of sec 38 ° to 4 decimal places.

a. 1.6243

b. 0.7880

c. 0.6157

d. 1.2690

Secd (38)

= 1/cosd (38)

= 1/sqrt[1-sind^2 (38) ] because cos^2 (x) + sin^2 (x) = 1

cos (30) = sqrt (3) / 2 = 0.8660

cos (45) = 0.707

so cos (38) can be assumed to some where around 0.8

= 1/0.8

= 1.25

Therefore D is correct answer