Question

If tan A = 1/√5and A lies in the II quadrant,then the value of cos A is
Pls give the formula and explain

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

1+tan2 x= sec2 x

=1+1/5

=6/5

Sec x=√(6/5)

Cos x=1/sec x

Cos x=√(5/6)

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