Given sin(−θ)=−1/4 and tanθ=√15/15 . what is the value of cosθ ?

Step-by-step explanation:

Given that and

Using those values we need to find value of

So let's begin with equation of   and simplify it to get value of  

 {since }

Step-by-step explanation:

The sine function is an odd function, that is:

Then,

The cosine function is computed by the following relation:

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.