Given sinxand 0 SolutionSinx 35 cosx 45 and tanx 34 At e

Solution

Sinx = 3/5 , cosx = 4/5 and tanx = 3/4

At every 2 angle one revloution is completed ,

Sin(x+17) = sin(x+) = -sinx = -3/5

Cos(x-12) = cos(12-x) = cos(-x) = cosx = 4/5

tan(x+5) = tan(+x) = tanx = 3/4

So,

sin(x+17)+cos(x-12)+tan(x+5) = -3/5 + 4/5 + 3/4 = 1/5+3/4 = (4+15)/20 = 19/20

Option b is answer.