Question

If sinA =cosA then find the value of 2tanA.

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Answer 1

sinA=cosA (given)

tanA=sinA/cosA

therefore, 2tanA=2(sinA/sinA)

=2(1)

=2

Answer 2

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SinA = CosA

We know that Sin 45 = Cos 45

                So, A =45

SO, 2tan A + Cos^2A = 2tan 45 + cos^2 45

                                    = 2(1)  +(1/√2)^2 = 2+1/2 = 4+1/2 = 5/2