How to find sine, cosine, and tangent when given two angles?

Sin(35) = opp/hyp

Cos(35) = adj/hyp 

Tan(35) = opp/adj 

However, when we use angle '55' things 'turn around'. 

Sin(55) = adj/hyp

Cos(55) = opp/hyp

Tan(55) = adj/opp

NB Inspect your diagram and carefully notice how the sides change. ,

However, to answer your question. you will nee and calculator or a book of tables. 

From the Calculator 

Sin(35) = 0.57357...

Cos(35) = 0.89151

Tan(35) =0.70020

Sin(55) = 0.81915

Cos(55) = 0.57357

Tan(55 = 1,42814

NB Notice how the decimal values change between Sine & Cosine

Looks like they gave you all 3 angles

sin(t) = opp / hyp

cos(t) = adj / hyp

tan(t) = opp / adj