Question

if sinA = cosA, then find 2tanA + cos sqA

Answer 1

2tanA+Cos²A
2(sinA/CosA)+Cos²A
2(cosA/CosA)+Cos²A
2+cos²A

Answer 2

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