Question

If sinA=1/3 find cosA​

Answer 1

Answer:

Step-by-step explanation: here,

sin a = 1/3 means that according to the formula of pythagorus theorem sin = p/h . so, p=1 and h=3 .

for finding cos we need b/h. we have h but not b .

A.T.O

b=under root h square - p square

b= under root 9-1

b= under root 8

b=2root 2

thus, the answer is cos = 2root 2/3.