1/4 is a fraction and -4x is a negative. I hope this helps you :]
Answer:
based on the fact there are no listed choices, a true statement would be about how the number of times heads came up would be about 50% or 25 times
Step-by-step explanation:
Answer:
Step-by-step explanation:
Since π=3.14 and 1.75 should be half of π so cos(1.75) should be in the approximation of 
or 
.
Clearly Sam's calculator is in the degree mode since 
is about 
and obviously, 
, So on the unit circle, it will be in the second quadrant.
Thus, cos(1.75) is negative.
From the figure, we immediately have
cos(θ) = 8/17
sin(θ) = 15/17
By definition of tangent,
tan(2θ) = sin(2θ)/cos(2θ)
Recall the double angle identities:
sin(2θ) = 2 sin(θ) cos(θ)
cos(2θ) = cos²(θ) - sin²(θ) = 2 cos²(θ) - 1
Then
tan(2θ) = (2 sin(θ) cos(θ)) / (2 cos²(θ) - 1)
tan(2θ) = (2 × 15/17 × 8/17) / (2 × (8/17)² - 1)
tan(2θ) = -240/161
It should be A-one solution
