1+tan / sin + cos = sec

in steps

Step-by-step explanation:

(1+tan) / (sin + cos) = sec

1+tan = 1 + sin/cos = (sin + cos) / cos

(1+tan) / (sin + cos) = ((sin + cos) / cos) / (sin + cos) = 1 / cos = sec

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%