If sin α + cos α = 1.2, find sin α · cos α THANKS! (:

Using trigonometric relations, it is found that:

We are given that:

Hence:

The basic relation is:

Hence:

Which is a quadratic equation, with coefficients .

Using a quadratic equation calculator, and considering that the cosine has to assume a value between 0 and 1, it is found that the solutions are:

Since , there are two solution pairs:

They result in the same multiplication result, hence:

To learn more about trigonometric relations, you can take a look at link

the 4th choice is the correct one

step-by-step explanation: