Answer:
Choice C
Step-by-step explanation:
The quadrant in which an angle lies determines the signs of the trigonometric functions sin, cos and tan
If an angle Θ lies in quadrant IV, cos(Θ) is positive and both sin(Θ) and tan(Θ) are negative
Two of the trigonometric identities we can use are
1. and
2.
Using identity 1, we can solve for cos(s) and cos(t)
Since both angles lie in quadrant IV, both cos(s) and cos(t) must be positive so we only consider the positive signs of both values
Using identity 2, we can solve for cos(s-t)
Multiplying numerator and denominator of the first term by gives us the final expression as
Answer:
x=-6
Step-by-step explanation:
first we want to find the missing angle inside of the triangle. To do that we subtract the angles that are given by 180 because all of the angles in a triangle should add up to equal 180
180-64-27=89
the angles outside of the triangle and the angle that equal 89 should also add up to equal 180 so we setup an equation
89+97+x=180
step 1 combine like terms
186+x=180 step 2 subtract each side by 186
x=-6 hope this helps (;
Answer:
Step-by-step explanation:
y=3+(3x/4) or y=3+(0,75x)
1/4 hr= 14 pages
1 hr=?
1/1/4*14
=56 pages