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Asked Oct 7, 2019
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O TRIGONOMETRIC IDENTITIES AND EQUATIONS
Ma
Double-angle identities: Problem type 1
Es
3
Find sin 2x, cos 2x, and tan2x if tanx=
and x terminates in quadrant III
4
sin 2x
?
cos2x
=
tan 2x
=
X
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O TRIGONOMETRIC IDENTITIES AND EQUATIONS Ma Double-angle identities: Problem type 1 Es 3 Find sin 2x, cos 2x, and tan2x if tanx= and x terminates in quadrant III 4 sin 2x ? cos2x = tan 2x = X

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Expert Answer

Step 1

To evaluate the trigonometric ratios of twice the given angle

Step 2

Find sinx and cos x , using Pythagoras and the fact...

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tan x 3/4, so sinx-3/5, A 4 cos X4/5 OB-5,using Pythagoras

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