Question

Given that sin =a/b then cos is equal to what ??

Answer 1

sin=a/b

than

cos=?

cos=c/b

Hope it helpz u☺❤

Answer 2

Answer:

Let PRQ BE A RIGHT ANGLED TRIANGLE AT R, ANGLE R IS 90 DEGREE

LET ∠PQR =∅

SO BY PYTHAGORUS THEOREM

PQ²=PR²+QR²

→b²-a²=QR²

→QR=√b²-a²

cos∅=base/ hypotenus

so cos∅= √b²-a²   /   b²