Question

If tan3x = sin45ºcos45º+cos30º ,then the value of x will be

A:15
B:30
C:45
D:60

Answer 1

Answer:

x=15

Step-by-step explanation:

Answer

R.H.S

sin45⋅cos45o+sin30

=21.21+21

=21+21

=22

=1

Now,

L.H.S

tan3x=1

But tan45o=1

∴tan3x=tan45

⇒3x=45

⇒x=345

∴x=15.