Asked by Anonymous
if cot 20 degree=y then find the value of 1+tan square 70 degree
Answers
Answered by
Reiny
tan70
= tan(90-20)
= cot 20
but cot 20° = y
then 1 + tan^2 70
= 1 + cot^2 20°
= 1 + y^2
= tan(90-20)
= cot 20
but cot 20° = y
then 1 + tan^2 70
= 1 + cot^2 20°
= 1 + y^2
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