Given that cosθ=817 and sinθ=−1517 . What is the value of tanθ?
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Yes , she is right. All the remaining can be expressed in binomial.
II)
is a binomial
iii) is a binomial
iv) is a binomial
v) =
is also a binomial
THe first thing we need to do is find the hypotenuse. From the tangent we know that the legs of the right triangle are 3 and 4. So this 2/3 of a special right triangle (3-4-5). Thus the hypotenuse is 5. The sin is defined as 
. We know the opposite is 4 and hypotenuse is 5. Thus the sin is 