Question

If sin theta =20\29 then find cos theta

Answer 1

Answer:

Cos Theta = 21/29

Step-by-step explanation:

Sin²Theta + Cos²Theta = 1

(20/29)² + Cos²Theta = 1

400/841 + Cos²Theta = 1

Cos²Theta = 1 - 400/841

Cos²Theta = (841 - 400) ÷ 841

Cos Theta = √441/841

Cos Theta = 21/29