Question

if sec 4a is equal to cosec( A- 20) degree Where 4A is an acute angle find the value of a

Answer 1

hope it helps you.....

Answer 2

sec4a=cosec (A-20)
cosec (90-4a)=cosec (A-20)
=>90-4A=A-20
=> 4A+A=90+20
=> 5A=110
=> A=110/5
=> A= 22