Question

What is the exact value of math problem cot 420 in trigonometry problem of math solutions Please let me know it's answer please

Answer 1

Answer:

cot(420)

=cot(360+60)

since,it lies in first quardant so its value will be positive

now,cot(360+60)=cot60=1/√3

it is cot 60 because 360 is even multiple of 90 so,in case of even multiple same trigonometric ratio is taken with + or - sign,depending in which quadrant it lies.