Help
Contact
For teachers and institutes
Search courses, problems, tests…
A
A
>_
StemPy Lab
Courses ▾
Problems ▾
Practice ▾
Mock Tests
Classes
Groups
Community ▾
A
A
If tan x = 2, then tan 3x is | StemPy Lab
Quizzes
/
If tan x = 2, then tan 3x is
Mathematics
Medium
High School (11–12)
Trigonometry › Compound and Multiple Angles
A-Level
AP
IB
JEE Main
Created by
StemPy Lab
If
tan
x
=
2
\tan x = 2
tan
x
=
2
, then
tan
3
x
\tan 3x
tan
3
x
is
6
11
\dfrac{6}{11}
11
6
−
2
11
-\dfrac{2}{11}
−
11
2
2
11
\dfrac{2}{11}
11
2
6
6
6
Check Answer
Log in to save
Tag someone
⚑ Report
← All Quizzes
← The exact value of sinπ/8 is
Kavya first writes cos² x - sin² x as one trigonometric function, then sketches it from x = 0 to x = 2π. Which sketch is hers? →
More on
Trigonometry › Compound and Multiple Angles
Discussion (0)
Log in
to join the discussion.
Loading…
Show that cos 20° cos 40° cos 80° = 1/8, and write the product as a decimal.
Hard
Prove that (cos 9x - cos 5x)/(sin 17x - sin 3x) = -(sin 2x)/(cos 10x).
Medium
Write 2 cos 5x cos 3x as a sum of two cosines…
Easy
Prove that (1 - cos 2x + sin 2x)/(1 + cos 2x + sin 2x) = tan x.
Medium
All problems on this topic →