Question

If sin theta =9/15,find cos theta

Answer 1

Answer:

cos ∅ = 12/15

Step-by-step explanation:

We know that,

sin ∅ = Perpendicular/Hypotenuse

cos ∅ = Base/Hypotenuse

Now, P = 12 and H = 15 as per the question

∴ Base² = H² - P²

⇒ Base = $\sqrt{221-81}$

⇒Base = √144 = 12

∴ cos ∅ = B/H = 12/15