Find sin x/2, cos x/2, and tan x/2 from the given information.. cos x = −15/17, 180° < x < 270°. sin x/2=. cos x/2=. tan x/2=

Trigonometry is the science of mathematics that studies the relationship between sides and angles in triangles

In a cartesian plane, the angle α can vary from 0 ° to 360 °, counterclockwise

This coordinate field is divided into 4 quadrants:

For half angle we can find it from double angle

Trigonometry Formulas for Double Angles:

sin 2A = 2 sin A cos A

cos 2A = 1 - 2 sin²A = 2cos²A-1

tan 2A = 2 tan A / 1-tan²A

then:

cos 2A = 2cos²A-1

cos 2A = 1-2 sin²A

in the same way

input the value : cos x = −15/17

Because x in the quadrant III (180° < x < 270°) , then

For quadrant I, only sin have positif value, for cos and tan have negatif value

trigonometric ratio

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Prove the converse of the Pythagorean Theorem

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Use Pythagoras' theorem

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the triangle angle  

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i don't see any steps below, sweetheart

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )