tolong 21-24 yaa, butuh bangett, makasihhh

21. θ = sudut lancip

tan θ= 12/5 --> triple pitagoras 12, 5, 13
cos θ = 5/13
cot θ = 5/12

tan (270 - A) + cos (180 + θ) = cot θ- cos θ =  5/12 - 5/13 = 125/156

22. cos α = (√5)/(5) = x/r
y =√r²-x² =√(5²-5) = 4√5
cot (π/2 - α)= tan α = y/x = 4√5/(√5)= 4