Question

cos 50°=? *

2 points

A) sin 50°

B) tan 50°

C) sin 40°

D) tan 40​

Answer 1

Step-by-step explanation:

C) Sin40°

Reason: Cosx is Sin(90-x)

Answer 2

$cos \: {50}^{0} = sin \: {40}^{0}$

Because Cos x = Sin ( 90 - x )

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