Question

If tan B =3/4 then
3 sin 2B + 4 cos 2B =?​

Answer 1

Step-by-step explanation:

G.E.=3(  

1+tan  

2

B

2tanB

​  

)+4(  

1+tan  

2

B

1−tan  

2

B

​  

)=  

1+(9/16)

6(3/4)

​  

[  

1+(9/16)

1−(9/16)

​  

]=  

15

72

​  

+  

25

28

​  

=4