Question

7.
tan10° tan15º tan 75°tan 80° = ?​

Answer 1

Answer:

Formula : tan (90-0)=cot 0

Using this formula :

Tan 10 tan15 tan(90-15)tan (90-10)

=tan10 tan 15 cot 15 cot 10

As, tan0=1/cot0

Using this

U get answer =1

Hope this will help you

Answer 2

Answer:

it is an trigo

Step-by-step explanation:

op .mean o dhf cos