if tan a = cot (30+2a) find a
Answers
Answered by
2
tan a = cot (30+2a)
(as from identity tan a =cot(90-a))
Then
tan a =tan (90 -30-2a)
(by converse tan (90 -30-2a))
tan a = tan (60-2a)
(cancelling tan on both sides)
a = 60-2a
3a = 60
a = 20
:) Hope this helps!!!!!
(as from identity tan a =cot(90-a))
Then
tan a =tan (90 -30-2a)
(by converse tan (90 -30-2a))
tan a = tan (60-2a)
(cancelling tan on both sides)
a = 60-2a
3a = 60
a = 20
:) Hope this helps!!!!!
Answered by
1
Answer:
tanA = cot( 30 +2A)
=> cot(90-A) = cot( 30 + 2A)
on comparing both sides,
90 -A = 30 + 2A
=> 90 - 30 = 2A + A
=> 60 = 3A
=> A = 20°.
Step-by-step explanation:
formula used : cot( 90 - ∅) = tan∅.
Similar questions