Prove the identity.-tan 2 x + sec 2 x = sec 2 x cos 2 x
What will be an ideal response?
-tan 2 x + sec 2 x = - 
+ 
= 
(-sin 2 x + 1) = sec 2 x cos 2 x.
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The ratio of lime to sand in mortar is 3 to 8. How much lime must be mixed with 72 bags of sand to make mortar? ? Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
Find an equation of a parabola that satisfies the given conditions.Focus (6, 7), directrix y = -3
A. (x - 6)2 = 20(y - 7) B. (x - 6)2 = 20(y - 2) C. (y - 7)2 = 20(x - 6) D. (x - 7)2 = 20(y - 2)
Use the rule of total probability to find the indicated probability.Two stores sell a certain product. Store A has 26% of the sales, 3% of which are of defective items, and store B has 74% of the sales, 4% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives one of this product as a gift. What is the probability it is defective?
A. 0.037 B. 0.29 C. 0.035 D. 0.019
Convert the angle from degrees to radians. Express the answer as a multiple of ?.-650°
A. - 
B. - 
C. - 
D. - 