Question

If sin a =cos(2a-45°) then find tan a ?
Please answer this as soon as possible
Please please please

Answer 1

Answer

Step-by-step explanation:

Sin a = cos 90 - a

Thus 90 - a = 2a - 45

3a = 135

a= 45

Tan a = tan 45 = 1

Answer 2

Answer:

sina = cos( 2a - 45)

=) cos( 90 - a) = cos ( 2a - 45)

since, ( cos[90 - ∅ ] = sin∅)

on comparison both sides

90 - a = 2a - 45

=> 90 + 45 = 2a + a

=> 135 = 3a

=> a = 135/3

= 45

so, a = 45°

now,

tan a = tan 45° = 1