CUET Preparation Today
CUET
General Test
Quantitative Reasoning
Trigonometry
The value of tan 48° . tan 23°. tan42° . tan67° is :
0°
1
$\frac{1}{2}$
$\sqrt{3}$
By using
tanA × tanB = 1 Iff A + B = 90º
tan 48° . tan 23°. tan42° . tan67°
= tan 48° × cot 42°× tan 23° × cot23°
= 1
