Given the value of cos 25° ≈ 0.9063, enter the sine of a complementary angle. Use an expression relating trigonometric ratios of complementary angles.

Question

cos 25° =___ ° ≈ ____

Answer 1

cos(x) = sin(90-x)

That's what the co- in cosine means: sine of the complement.

Answer 2

what do you mean i dont get it ..

Answer 3

what, you can't figure 90-25 ?

Answer 4

no like what i put in the boxes ..

im taking a practice test for next year lol im still in algebra 1 and have no knoledge in geometry yet

Answer 5

He did not understand my reply to the last question either. He clearly has not studied the material yet.

Answer 6

im not taking a geometry class yet .. im still in algebra 1

Answer 7

If you were taking geometry, you would be in serious trouble.

Answer 8

lol obviously.. i dont really understand any of this