Math Quiz

Which of the following is not true about the graph of sine, cosine and tangent functions?

• A. The graph of y = cosx is the graph we get after shifting y = sinx to left.

• B. The graph of cosine and sine functions have a period of 27 radians.

• The graph of tangent function does not have period.

Which of the following is the characteristics of the power function y = 0.5x" for positive n?

• It decreases as x increases.

• B. It has horizontal asymptote.

• Its graph passes through the origin.

• D. Its value is always negative.

In the process of finding zeros of the polynomial function f(x) = x² + 6x + 8, which one is not true about the breakdown of the problem-solving process?

• A) Decide on a method to find the zeros is a DURING process

• B) Ensure the polynomial is in the form of ax² + bx+c is a BEFORE process

• (0) The zeros x = -2 and x = -4 are the points where the graph of the polynomial intersects the x-axis is an AFTER process.

• Substitute x= -2 and x = - 4 back into the original polynomial to check that they satisfy f(x)=0 is a DURING process

The value of cos(π) is

• 0.5

• DY

• -0.5

A man is standing 45√3m from the base of the building and measures an angle elevation 30°. Then what will be the height of the building neglecting his height?

• A) 30√3m

• 45√3m

• 45m

• D) 30m

In a right triangle, if the length of the hypotenuse is 10 and the length of the side opposite angle B is 6, what is the value of sin(B)?

• C. 5/6

• B. 6/10

• A. 4/5