, 30.11.2020rosaa7

# If sin∠X = cos∠Y and m∠X = 72°, what is the measure of ∠Y? a. 18° b. 72° c. 90° d. 108° hollycoleman13

A. 18°

Step-by-step explanation:

Using the cofunction identity

sin x = cos(90 - x)

Hence

sin72° = cos(90 - 72)° = cos18° ⇒ ∠Y = 18° elissiashontelbrown
The answer is 18 ur welcomeee VinTAEge
a: 18°

step-by-step explanation:  tlarson9872

Option A is correct.

Step-by-step explanation:

We are given

sin∠X = cos∠Y

And value of ∠X= 72°

we need to find value of ∠Y

Putting value of ∠X in the given equation

sin∠X = cos∠Y

sin(72°) = cos∠Y

=> cos∠Y = 0.951

Now we take cos^-1

∠Y = cos^-1(0.951)

∠Y = 18.01 ≈ 18°

So Option A is correct. cravens511peeelg

18°

Step-by-step explanation:

Using the cofunction identity

sin x = cos(90 - x)

Hence

sin72° = cos(90 - 72)° = cos18° ⇒ ∠Y = 18°  ### Other questions on the subject: Mathematics Mathematics, 21.06.2019, kuon If the diameter is 8 than the radius is 4 because 2r or 2*radius equals the diameter. 4*2=8. 8/2=4....Read More Mathematics, 21.06.2019, kidzay
7 is the median   7.875 is the meanstep-by-step explanation: 3,4,5,6,8,11,13,13...Read More Mathematics, 21.06.2019, antmaan15 Mathematics, 21.06.2019, GTYT9972
the  office resources  are the human, physical and financial  resources  which are utilized for performing all the activities in order to achieve the organizati...Read More   