Find the values of the inverse function in radians.
sin^-1(0.65)
a. 0.71+2pi n and -0.71+2pi n
b. 0.71+2pi n and -3.85+2pi n
c. 0.86+2pi n and -0.86 +2pi n
d. -0.61+2pi n and 2.54+2pi n
2. tan^-1(0.09)
a.-0.09+2pi n
b. no such angle exists
c.-1.48+ pi n
d. -0.09+ pi n
I've been stuck on these two for such a long time. I think the first one is a. I don't know about the second one. I feel like it's b, if not, then either a or d... I can't seem to figure it out anymore
22 answers
Nevermind, the answers were b and d:/
#1
the solutions from 0 to 2π
would be .71 and π - .71
or .71 and 2.43
so I was expecting to see:
.71 + 2π , 2.43 + 2π
I don't see that, but when n = 0 , the first part of the solution should work
e.g. sin(-.71) ≠ .65 , so not A
sin *.86) ≠ .65, not C
sin (-.61) ≠ .65, not D
that leaves B.
notice when n = -1
2.43-2π = -3.85 <--- a 2nd quadrant angle
the correct choice is B
What a poor way to state the answer!!
#2
tan^-1 (.09) = .089 or π + .089
= .089 or 3.23
So my solution would be
.089 + π, 3.23 + π
again, this is not shown, so are they being sneaky again??
clearly B is wrong, since I found answers
tan(-.09) = -.09 , so NOT A
tan(-1.48) = -10.98 , so NOT C
bogus question!
the solutions from 0 to 2π
would be .71 and π - .71
or .71 and 2.43
so I was expecting to see:
.71 + 2π , 2.43 + 2π
I don't see that, but when n = 0 , the first part of the solution should work
e.g. sin(-.71) ≠ .65 , so not A
sin *.86) ≠ .65, not C
sin (-.61) ≠ .65, not D
that leaves B.
notice when n = -1
2.43-2π = -3.85 <--- a 2nd quadrant angle
the correct choice is B
What a poor way to state the answer!!
#2
tan^-1 (.09) = .089 or π + .089
= .089 or 3.23
So my solution would be
.089 + π, 3.23 + π
again, this is not shown, so are they being sneaky again??
clearly B is wrong, since I found answers
tan(-.09) = -.09 , so NOT A
tan(-1.48) = -10.98 , so NOT C
bogus question!
If D is the choice , then when n = 0, we get
tan(-.09) = -.09 which is NOT the given
D is wrong
tan(-.09) = -.09 which is NOT the given
D is wrong
2. tan^-1(-0.09)
the answer would be D believe it or not -0.09+ pi(n)
the first question is correct however the answer would be B
0.71+2 pi (n) and -3.85+ 2 pi (n)
apologies for the confusing writing I don’t have the pi symbol on hand.
(the answers are verified and correct)
the answer would be D believe it or not -0.09+ pi(n)
the first question is correct however the answer would be B
0.71+2 pi (n) and -3.85+ 2 pi (n)
apologies for the confusing writing I don’t have the pi symbol on hand.
(the answers are verified and correct)
b
a
b
c
b
c
a
a
a
b
a
a
b
c
b
c
a
a
a
b
a
100
May 2021 100%
unit 7 lesson 9 quiz 1, angry man 100% correct for Algebra 1 connexus
Still correct in 2022
Angry man.. Buddy.... U r a god send <3
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angry man is still correct!! thank you so much!!
100% (Angry Man) In May 2022
Still good
still good
still good!!! you're a lifesaver :]
GOOD!
Oh my god 12 minutes ago
solving trigonometric equations using inverses quiz <3
1. b) -0.36
2. a) -2
3. b) 1
4. c) tan^2 theta = sin^2...
5. b) 60°
6. c) 60°
7. a) 0.71
8. a) -0.09
9. a) 2pi/3, 4pi/3
10. b) pi/4, 5pi/4
11 a) cos theta = 16/20
please use these to check your answers (dont cheat lmao)
1. b) -0.36
2. a) -2
3. b) 1
4. c) tan^2 theta = sin^2...
5. b) 60°
6. c) 60°
7. a) 0.71
8. a) -0.09
9. a) 2pi/3, 4pi/3
10. b) pi/4, 5pi/4
11 a) cos theta = 16/20
please use these to check your answers (dont cheat lmao)
Moss is correct
Moss is correct for me toooooo
Thanks angryman and moss
Is this the new jiskha?
1 answer