Originally Posted by

**SolCon** Greetings to all.

I having difficulty solving this straight-forward question. Basically, I just don't know what to do next. Here it is:

Q. The acute angle x radians is such that tan x = k, where k is a positive constant. Express, in terms of k,

Now, this comes in 3 parts which are:

(i) tan(pi − x),

(ii) tan[(1/2)pi − x],

(iii) sin x.

I'm stuck because I don't know how to proceed. Like in part (i), I write:

tan x=k,

x=tan^-1 (k),

tan (pi-tan^-1(k) ),

tan.pi - k.

I just end up with the question, the only difference being that instead of x, there's k. How should I satisfy the question's demand?