Question

The value of $co{s}^2\theta +se{c}^2\theta$ is always

• A. less than 1
• B. equal to 1
• C. greater than 1, but less than 2
• D. greater than or equal to 2.

Answer 1

Answer: (D)

$co{s}^2\theta +se{c}^2\theta =(cos\theta -sec\theta {)}^2+2>2$