Find the value of if and
Here is what I did.
Now I drew a right triangle and labeled the angle with respect to
So the hypotenese was 17 and was 15.
Now to find the side of the triangle I applied Pythagorus' theorem
and set it up like this: . solved for ← here!
According to me, cosine should be , but the computer won't accept the answer.
You overlooked one of the conditions: .
. . If is negative, then is in Quadrant 2 or 3.
Since is positive, is in Quadrant 1 or 2.
. . Hence, is in Quadrant 2.
Your triangle should look like this:Code:* | | \ 17 | 8| \ | | \ θ - + - - - + - - b |
Be very careful when using Pythagorus . . .
You had: .
. . Then: . ±
And you must choose the correct sign, you see.