Question

can anyone pls help:
Solve each equation for principal values of Express solutions in degrees; sin2x-1=0

Answer 1

Hint:

sin 90 degrees = 1

Answer 2

sin2x-1=0

Add 1 to both sides. What do you get?

Answer 3

sin2x=1 right?

Answer 4

correct

and we know that sin 90 degrees = 1

so that means

sin 2x = sin 90

and removing sin we get:

2x = 90 degrees

what is x = ?

Answer 5

missing steps:

sin2x=1
sin 90 = 1

since they are both equal to 1, we can equate them to each other

Answer 6

45

Answer 7

and 45 degrees is your answer :)

Did you understand?

Answer 8

I understand most of it, but don't understand how sin2x=sin90

Answer 9

well, we know that

sin 2x = 1

and we know that
sin 90 degrees = 1

sin 2x = 1 = sin 90 degrees = 1

sin 2x = sin 90 degrees = 1

sin 2x = sin 90°

Answer 10

OHH, OK now i get it
THANKS

Answer 11

Anytime! Also, welcome to OpenStudy! :D

Answer 12

thanks

Answer 13

Anytime! Also, welcome to OpenStudy! :D

Answer 14

Anytime!