Question

3 - If tan A = 4/3 and sin A = 4/5 then cos A =

Answer 1

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Answer 2

Answer:

tanA= 4/3 and sinA= 4/5, cosA=?

There is a formula in trigonometry

sinAcosAtanA= PBP/HHB

P= Perpendicular, H= Hypotenis, B=Base

sinA= P/H, cosA= B/H, tanA= P/B

H will same in sinA and cosA.

tanA is what.

tanA= sinA/cosA or P/B.

tanA= 4/3 (3= cosA or Base) same thing

sinA= 4/5 (5=H)

Therefore,

cosA= B/H

cosA= 3/5. Here your Answer.