A traveler in Latvia Exchanged 5 US dollars for 2.6 lats at that rate . How much is 3 us dollors ?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Macy spent $36 on jeans. this was $12 less than twice what she spent on a shirt. which equation to solve this, 12x=36 2x=36-12 2x-12=36 12-2x=36

Find all the angles that satisfy the equation cos(θ)=32