What is the value of 3 tan 20°.tan 45°.tan 70°?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 3.
3 tan 20°.tan 45°.tan 70°
= 3 tan 20°.tan 70°
= 3 tan 20°.cot 20°
= 3 × 1
= 3
Hence, the value of the expression is 3.