Question

if sin thetha is 20/29 then find cos thetha​

Answer 1

ANSWER :

SIN∅ = P/H = 20/29

On comparing it

P = 20, H = 29

By Pythagoras theorem:

H²=P²+B²

29²=20²+B²

841-400=B²

B=√441

B=21

Now,

Cos∅ = B/H = 21/29

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