Question

Hey! Can someone please help me with
B, C, and D? Thanks a lot! :)
P.S. check the attachment! :P

Answer 1

for b, make the csc into 1/sin

Answer 2

i did but how would you solve it?

Answer 3

you will get sin^2(x) = 3/4

Answer 4

would you leave it like that?

Answer 5

nope. square root and use sin inverse

Answer 6

would i put it into the calculator?

Answer 7

remember square root gives you 2 solutions, use sin inverse for both

Answer 8

\[\sin^{-1} (\sqrt{\frac{ 3 }{ 4 }}) and \sin^{-1} (-\sqrt{\frac{ 3 }{ 4 }})\]

Answer 9

would i put that into the calc?

Answer 10

yes

Answer 11

is there a way i could do it w/o the calc?

Answer 12

it is a special angle. you must memorize it

Answer 13

the answer is pi/3

Answer 14

how did you get that?

Answer 15

you must memorize the special angles. or you can play around with the calculator and see what you get tin degrees then convert to radians

Answer 16

no other way about it

Answer 17

in*

Answer 18

for d)
cosxsinx-2cosx = 0
cosx(sinx-2) = 0
solve cosx = 0 and sinx = 2

Answer 19

thank you!
i may ask you to clarify ob it tomorrow