Question

If cos(a +B) =3/5, sin(a- B) =5/13
and
0<a,ß < π/4 tan(2a) is equal to
​

Answer 1

Step-by-step explanation:

tan2α=tan(α+β+α−β)=

1−tan(α+β)tan(α−β)

tan(α+β)+tan(α−β)

=

1−

4

3

×

5

12

4

3

+

5

12

=

20

20−36

20

15+48

tan2α=

−16

63

Answer 2

Step-by-step explanation:

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