Question

1. For what values is the following equation true? sin(x+20)=cos(y−10)
A. X=30 and y=60
B. X=30 and y=40
C. X=20 and y=50
D. X=20 and y=60
2. In a right triangle ABC where sinA=cosB , what are the measures of angles A and B if the measure of angle A is 3 times the measure of angle B ?
A. m∠A=67.5° and m∠B=22.5°
B. m∠A=22.5° and m∠B=67.5°
C. m∠A=135° and m∠B=45°
D. m∠A=45° and m∠B=135°

Answer 1

B. m∠A=22.5° and m∠B=67.5°