Verify the identity.cos 
= -sin x
What will be an ideal response?
cos
= cos(x)cos
- sin(x)sin
.
Since cos
= 0 and sin
= 1, then cos
= cos(x)(0) - sin(x)(1) = -sin x.
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Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 0.00142857 B. 700 C. 100 D. 0.07
Solve the problem.Let f(x) = cos x, g(x) = x - ?/2, and h(x) = 2x. Find h(f(x)).
A. 2 cos x B. cos(2x) C. 2 cos(x - ?/2) D. cos(x - ?/2)
For a circle, the constant ratio of the circumference C to length of diameter dis represented by the number 
.
Answer the following statement true (T) or false (F)
For the measured quantity, state the set of numbers that is most appropriate to describe it. Choose from the natural numbers, integers, or rational numbers.Temperatures given in a weather forecast in Cayembe, Equador (this town is on the equator)
A. Rational numbers B. Integers C. Natural numbers