Can someone help me with number 3 please and I thank you so much

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Question 2 of 102 pointsthe temperature is 45°f. the temperature will decrease by 2°f each hour. leth be the number of hours.when will the temperature be below 32°f? write an inequality for this problem.oa. 45 + 2h 32b. 45 + 2h< 32o c. 45 - 2h< 32od. 45 - 2hs 32

Agrocery store has fruit on sale -5 bananas for $1.50, 4 mangos for $5.00, and 3 oranges for $4.00. mrs. kang buys 15 bananas, 12 mangos, and 12 oranges. how much money does she spend?