I have done half but i am not able to find angle in part2?

Question

I have done half but i am not able to find angle in part2?

1 Answer

Impact of this question

1262 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-07-24T12:09:38

$theta = 0^circ, -109.5^circ, 109.5^circ$

Explanation:

Continuing from the factored equation

$(3costheta+1)(costheta-1) = 0$

Either $costheta = -1/3$ or $costheta = 1$ .

Solving $costheta = 1$ :

Remember that $costheta$ is an even function, so $cos(-theta) = costheta$ . Essentially, if we find $theta$ that satisfies the equation, $-theta$ will also satisfy it.

$costheta = 1$

$theta = +-0^circ = 0^circ$

Solving $costheta = -1/3$ :

$costheta = -1/3$

$theta ~~ +-109.5^circ$

The three solutions to the equation are $theta = 0^circ, -109.5^circ, 109.5^circ$ .

Science

Math

Humanities

... and beyond

I have done half but i am not able to find angle in part2?

1 Answer

Explanation:

Related questions

Impact of this question