2009 · Q22
Consider the following:
- I(cos⁴θ − sin⁴θ)/(cos²θ + sin²θ) = cos²θ(1 + tan θ).
- II(1 + sin θ)/(1 − sin θ) = (tan θ + sec θ)².
Which of the statements given above is/are correct?
Elementary MathematicsTrigonometry
- AI only
- BII only
- CBoth I and II
- DNeither I nor II
Explanation
I is false, II is true (equals (secθ+tanθ)²).