How to do this?

Question

How to do this?

1 Answer

Impact of this question

1417 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-07-11T01:43:26

I tried it but I am not sure about it. I interpreted "possible" as the possibility to find the unknown quantity (angle).
Anyway, Alan gave a more interesting and complete reason in the comment below (I included Alan's comment in the answer).

Explanation:

The first and third can be solved in the sense that we can find a value of $θ$ $theta$ that satisfies the equation.

For example:

a. $sin θ = - \frac{2}{5}$ $sintheta=-2/5$

$θ = - {23.578}^{\circ}$ $theta=-23.578^@$

b. $tan θ = \frac{85 - 22}{8}$ $tantheta=(85-22)/8$

$θ = {82.763}^{\circ}$ $theta=82.763^@$

The second has two variables $α$ $alpha$ and $β$ $beta$ so that having only one equation we will not be able to solve it.

Alan N. tells us :
b is not possible. Irrespective of the values of $α$ $alpha$ and $β$ $beta$ , $sin α \leq 1$ $sinalpha<=1$ and $cos β \leq 1$ $cosbeta<=1$ .

Hence

$3 sin α + 4 cos β \leq 7$ $3sinalpha+4cosbeta<=7$

Science

Math

Humanities

... and beyond

How to do this?

1 Answer

Explanation:

Related questions

Impact of this question