If sin2 θ cos2 θ = $\frac{2}{9}$, then what will be the value of cosec2 θ + sec2θ ? |
7/2 5/2 9/2 $9\sqrt{2}$ |
9/2 |
We are given that :- sin²θ . cos²θ = \(\frac{2}{9}\) Now, cosec²θ + sec²θ = \(\frac{1}{sin²θ}\) + \(\frac{1}{cos²θ}\) = \(\frac{cos²θ + sin²θ}{sin²θ .cos²θ }\) { we know, sin²θ + cos²θ = 1 } = \(\frac{1}{sin²θ .cos²θ }\) = \(\frac{9}{2}\) [ given :- sin²θ . cos²θ = \(\frac{2}{9}\) ] |