Question

Which pair of angles has congruent values for the sin x° and the cos y°? (4 points)
Select one:
a. 40°; 140°
b. 40°; 80°
c. 40°; 50°
d. 40°; 40°

Answer 1

@TuringTest @timo86m @Opcode @phi @ganeshie8

Answer 2

hint :
cos(y) = sin(90 - y)

Answer 3

what would y be

Answer 4

take it one of in options, wht do you get ?

Answer 5

is it B

Answer 6

let's recheck again, if the answer is B
b. 40°; 80°

it mean, x = 40° and y = 80°

is sin(40) = cos80 ?
by using the identity above,
cos(y) = sin(90 - y)
put y = 80 to both sides, get
cos(80) = sin(90 - 80)
cos(80) = sin(10)

obvious, sin 40 not equals sin(10). so it is not right answer

please, try again

Answer 7

Ok its C i get it now

Answer 8

yes, you are right !

Answer 9

i see what you did there

Answer 10

can you fan me please

Answer 11

actually, the asker be fan me ;) lol

Answer 12

i did

Answer 13

can you help with another