21-05-2019
Mathematics

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Which letter could represent sin -135°?
A. a
B. b
C. c
D. d

Which letter could represent sin 135 A a B b C c D d class=

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21-05-2019

Answer:

Option D.

Step-by-step explanation:

we know that

Angle -135° is equal to

360°-135°=225°

The angle belong to the III quadrant

225°-180°=45°

sin(45°)=d/1=d

therefore

sin(-135°)=-sin(45°)=d ---> the value is negative

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