Question

Find the numerical value of:
tan9° . tan81° - cot9° . cot81°

Answer 1

Answer:

0

Step-by-step explanation:

cot81.tan81-tan81.cot81

1-1=0

using tan(90-theta) = cot theta

Answer 2

Answer:

= tan9°. tan81° - cot9°. cot81°

= tan9°. tan(90°-9°) - cot9°. cot(90°-9°)

= tan9°. cot9° - cot9°. tan9°

= tan9°. (1/tan9°) - cot9°. (1/cot9°)

= 1-1

= 0

The numerical value is 0.

HOPE IT WILL HELP U ☺️....

PLZZZ MARK THE ANSWER AS BRAINLIST ....