If cos(t) = −7/19 and tan(t) < 0, find sin(t) and cos(-t). ?
Give the answer as a fraction with a square root. Hint: Draw a triangle (perhaps within the unit circle) containing an angle with sides for the given trigonometric function.
Give the answer as a fraction with a square root. Hint: Draw a triangle (perhaps within the unit circle) containing an angle with sides for the given trigonometric function.
2 Answers
Explanation:
To find
We know this is positive because sine is positive in QII.
Because cosine is an even function,
Explanation:
Here,
From
So,
We know that,
Note: