Easy Trigonometry Question?I need help!?!?

Question

Still helping the children! Thankgoodness this is these last few questions posted are the last questions that I need help with to help them! If you can, I would really appreciate it if you look at my other questions! The stuff they have to learn today makes my eyes cross! Please put all of the work and any formula you had to do as part of your answer, I need it to understand and then further explain it to him! Thankyou for all of the help.
(I had to create this account because my other one isnt working very well, Thanks!)


Determine the angle that makes the following statement true.

sin 45° = cos________

Answer 1

45

Answer 2

45°
NOTE
A 45° triangle is a triangle with sides in ratio of 1:1:√2 where the hypotenuse is √2
Angles are 45° , 45° and 90°
From this triangle, sin 45° = 1 / √2
and cos 45° = 1 / √2

Answer 3

let a=unknown angle
sin a = cos(90-a)
sin 45 = cos (90-45)
sin 45 = cos 45

cos a = cos (360-a)
cos 45 = cos (360-45)
cos 45 = cos 315

Since sin 45 = cos 45
cos 45 = cos 315,
hence sin 45 =cos 315

So the answers are cos 45 and cos 315

Answer 4

2 easy sin 45=cos 45 explnd earlier in cos 10 problem

Answer 5

sin 45 = cos 45

Answer 6

there r an infinite angles that make this statement true,
i'll give u a sit of them
45
45+180 and 45-180
45+360 and 45-360
45+360+180 and 45-360-180

so , u can do this thing forever
good luck!

Answer 7

sin 45 = cos 45 and cos 315 too

Answer 8

Why do you keep on posting the same text with a different question at the bottom? There's no need to post nearly-identical questions if you just stop and learn the technique.

Answer 9

sin45= -cos(180-45)

Answer 10

trigonometry=calculus 1