Please help me on this. It would mean a lot to me. 1 ) prove that h²(cot² α - cot² β) = 2α²

2 ) if α=20°, β=30°, AC=360m, find the height of PQ​

(i beg for proper answers for these 2 questions please)​

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

What is the result of the following division?

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.