QUIZZIZ #3

To solve this equation, cos²x + sinx = 1, replace cos²x with

• 1/(tan²x)

• sin²x − 1

• 1 − sin²x

• 1 + tan²x

Why doesn't 2cosx − 3 = 0 have solutions?

• cos x is never bigger than one

• cos x is never equal to a fraction

• Actually, this equation does have a solution, x = π

• This equation will have a solution tomorrow.

Without using technology determine which of the following would be positive (all values are in degrees). (MULTI-SELECT question - multiple answers may be correct).

Find the gradient of the line, to three decimal places. USE TECHNOLOGY

• 0.7

• 1.428

• -0.7

• -1.428

Find the equation of this line. USE TECHNOLOGY

• y = 2.532x - 7.597

• y = -1.192x + 3.575

• y = -3.575x + 1.192

• y = -0.272x + 0.816

• 40/41

• -40/41

• -9/41

• 9/41