Question

63. tan 15°. tan 20°. tan 70°. tan 75" To
TC​

Answer 1

Answer:

tan20 tan15 tan70 tan75

it can be written as

tan20 tan70 tan15 tan75

tan[90-70] tan70 tan[90-75] tan75

cot70 tan70 cot75 tan75

1/tan70 tan70 1/tan75 tan75 [ tan is same so, get cancel]

so, =1

hence the answer is 1

any doubts u can comment

I'll definitely help