emmielopetrone3 emmielopetrone3

15-12-2018
Mathematics

contestada

For what value of x is sin x = cos 19°, where 0°< x < 90°? A. 38° B. 71° C. 26° D. 19°

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jimrgrant1 jimrgrant1

15-12-2018

Answer:

B

Step-by-step explanation:

using the cofunction identity

• sin (90 - x) = cosx / cos(90 - x) = sinx, hence

cos 19° = sin(90 - 19)° = sin 71°

Answer Link

sznaktyl sznaktyl

23-02-2021

Answer:

B

Step-by-step explanation:

using the cofunction identity

• sin (90 - x) = cosx / cos(90 - x) = sinx, hence

cos 19° = sin(90 - 19)° = sin 71°

Answer Link

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