Question

what is the value of sin315°?​

Answer 1

 

Find the Exact Value sin(315)

sin(315)sin(315)

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.

−sin(45)-sin(45)

The exact value of sin(45)sin(45) is √2222.

−√22-22

The result can be shown in multiple forms.

Exact Form:

−√22-22

Decimal Form:

−0.70710678…-0.70710678…

Answer 2

ɑղՏաҽɾՏ:-

the value of sin 315

radians - 7π/4

sin (theta) - -√2/2