Question

If cos A =2/5,find the value of 5+5tan^2A

Answer 1

I hope it is correct and helps you

Answer 2

Cos A = 2/5=b/h
b = 2 , h = 5 , p =?
we know that,
(h)²= (p)²+(b)²
(p)²= (h)²-(b)²
= (5)²-(2)² = 25-4= 21
p = ✓21
TanA =p/b
= ✓21/2
Therefore,
5+5Tan²A= 5+5×(✓21/2)


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