Question

Find the value of cot 10°.tan15°.tan45° tan75°.cot80°

Answer 1

Answer:1

Step-by-step explanation:

Tan(90-10)cot80.cot(90-15)tan75.tan45

= Tan80.cot80. cot75tan75 .tan45

=Tan80×1/tan80.cot 75×1/cot75×1

=1×1×1

=1