Question

*Fan & Medal*
Please help

Answer 1

What's the question?

Answer 2

Which expression shows the value of c?
a. \[\frac{ b }{ \tan 45 degrees }\]
b. \[\frac{ b }{ \cos 45 degrees }\]
c. a cose 45 degrees
d. a tan 45 degrees

Answer 3

@peachpi Do you understand this?

Answer 4

@heather_theginger Do you understand this?

Answer 5

@ziawasim could you please explain how you got the answer for me

Answer 6

ans is B
here c is hypotenuse and base and perpendicular have same length becoz angles are same if we take side b as base then cos45=b/c tthen c will be equal to c=b/cos45

Answer 7

This one could you check--> How are the sin 30° and the cos 60° related? Explain using complete sentences.

The thing that makes sin 30 degrees and cos 60 degrees is they both give you 1 over 2 (1/2), also when you add these two degrees together you get 90 degrees which makes a perfect right triangle or right angle.

Answer 8

@ziawasim that's what I thought but I wasn't sure

Answer 9

c is the hypotenuse, so you need to use either sin or cos.
cos 45 = adjacent/hypotenuse
cos 45 = a/c

Multiply both sides by c
c cos 45 = a

Divide both sides by cos 45
c = a/cos 45

This a 45-45-90 triangle so a = b.
c = b/cos 45

Answer 10

30 and 60 degrees are complements, so their sines and cosines are equal.
sin 30° = cos 60°
cos 30° = sin 60°