Question

(1 - sin 2e)sec2e = 1
solve the following​

Answer 1

L.H.S.=

${1 - {sin}^{2} } \times {sec}^{2} \\ = {cos}^{2} \times \frac{1}{ {cos}^{2 } } \\ = 1$

therefore L.H S = R. H. S

Answer 2

Answer:

First, male birds sing to mark territories. ... The second purpose of singing is to attract a mate for nesting. Female birds often choose their mates based on some blend of visual and vocal cues. Even male birds with beautiful breeding-season plumage can have trouble finding mates if their songs don't measure up.

Step-by-step explanation:

hope you are understand