Question

sec 60° − sin² 30°

विकल्प

• `2/sqrt3 − 1/4`

• `1 3/4` 

• `1 1/2`

• `2 1/4`

Answer 1

`bb1bb 3/bb4`

Explanation:

`sec 60° = 2, sin 30° = 1/2 = (1/2)^2 = 1/4` 

`2 − 1/4 = (8 − 1)/4 = 7/4 = 1.75`

`7/4 = 1 3/4`