Question

If( cos0 + sec0)=5/2 then(cos²0 + sec²0) is
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Answer 1

$\blue{A}$ ${N}$ $\red{S}$$\orange{W}$$\green{E}$]$\pink{R}$→

Given→

cos0 +sec0 = 5/2

To find→

cos²0 + sec²0

Solution→

$→ { \cos}^{2} 0 + { \sec }^{2}0 \\ = ( \cos0 + \sec0)^{2} - 2 \cos0. \sec0 \\ = {( \frac{5}{2} )}^{2} - 2 \cos0 \times \frac{1}{ \cos0 } \\ = \frac{25}{4} - </u><u>2</u><u> \\ = \frac{25 - </u><u>8</u><u>}{4} \\ = \frac{</u><u>1</u><u>7</u><u>}{4}$