Question

if 1+ tan²25=cosec²B then find B​

Answer 1

$B = 65$

Step-by-step explanation:

$1 + tan^{2} 25 = cosec^{2} B \\ sec ^{2} 25 = cosec^{2} B \\ sec25 = cosecB \\ sec25 = sec(90 - B) \\ 25 = 90 - B \\ B = 90 - 25 \\B = 65$