If cos 2A = sin 75°, then the smallest positive value of A is :
Answer & explanation
Correct answer: option 2
We know,
sinA = cosB Iff A + B = 90º
ATQ,
cos 2A = sin 75°
2A +75° = 90°
A = 7.5°
If cos 2A = sin 75°, then the smallest positive value of A is :
Correct answer: option 2
We know,
sinA = cosB Iff A + B = 90º
ATQ,
cos 2A = sin 75°
2A +75° = 90°
A = 7.5°