Question

plz answer the question​

Answer 1

Step-by-step explanation:

please mark me the brainliest

Answer 2

Answer:

√[1-(a/b)^2]

Step-by-step explanation:

let thita be x because thita symbol is not available in my keyboard

given sinx=(a/b)

we know that (sinx)^2+ (cosx)^2=1

then (a/b)^2+cos^2(x)=1

(cosx)^2=1-(a/b)^2

cosx=√[1-(a/b)^2]