Question

Find A if (sec A – 2) ( 2 cot 3A – 2) = 0​

Answer 1

Answer:

50°, 60° , 75° are the answer

Step-by-step explanation:

solve the equation ( sec A - 2) ( 2cot3A - 2)= 0

( sec A - 2) = 0

= sec A -2 = 0

= sec A = 2

= 1/cos A = 2

= 2 cos A = 1

= cos A = 1/2

= A = 60°

= tan3A- 1 = 0

= tan 3A = 1

= 3A = 45° or 225°

A = 45°/3 or 225°/3

A = 15° or 75°

A = 15° ,60°, 75°