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If cos13 + sin13 / cos13 – sin13 = tanA, then A = ?

If cos13 + sin13 / cos13 – sin13 = tanA, then A = ?

Grade:9

1 Answers

Arun
25758 Points
5 years ago
divide by cos13 in numerator and denominator
(1+ tan13)/(1- tan13)
we can write this as-
(tan45 + tan13)/(1- tan45 tan13)
tan(45+13)
tan58 = tanA
hence A will be 58 degree

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