Question

Evaluate : 2tan30°/1-tan^2 45°=?

Answer 1

Answer:

0

Step-by-step explanation:

Here is the explanation. ..

From the trigonometry table, we will get the value tan 30⁰ and tan 45⁰.

Tan 30⁰ ---> 1/root3

Tan 45° = 1

So placing it according to question,

2×1/root3/1-1

So as the DENOMINATOR is zero,

so the answer is also zero.

Points to Remember

• Whenever attempting these questions remember the trigonometry table
• Most common ie thise with value 1 are to be remembered as they frequently come
• 1/0 is zero
• But 0/1 is Infinity or ND(Not Defined)
• For forming trigonometry table

1. First write 1, 2 , 3 ,4
2. Divide it by 4
3. Put roots.

• Sin 's inverse sequence is cos.
• Sin/Cos is tan
• And others are inverse
• And hence your trigonometry table is formed

Answer 2

$\sf\dfrac{2Tan 30⁰}{1-tan²45⁰}$

$\sf\dfrac{2×{\sf\dfrac{1}{√3}}}{1-(1)²}$

$\sf\dfrac{{\sf\dfrac{2}{√3}}}{0}$ = 0