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Given that sin x = 3/5, 0 ≤ x ≤ 90, evalu...

Given that sin x = 3/5, 0 ≤ x ≤ 90, evaluate (tanx + 2cosx)

A.

21120

B.

1120

C.

2720

D.

120

Correct answer is B

Sin x = opphyp

sinx = 35

using Pythagoras' theorem

 hyp2 = opp2 + adj2

adj2 = 52 - 32 = 25 - 9

adj2 = 16 

adj =  16 

adj = 4.

tanx = oppadj

34

cosx = adjhyp

45

(tanx + 2cosx) = 34 + 2(45)

15+3220

4720 or 

2 720