Question

If
A = 142° then 2cos A/2​

Answer 1

Answer:

hi

please mark me as the brainliest

Step-by-step explanation:

solution:

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB,

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2 and

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2 andcos A = cos2 A2 – sin2 A2

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2 andcos A = cos2 A2 – sin2 A2Now tan 142½°

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2 andcos A = cos2 A2 – sin2 A2Now tan 142½°= tan (90 + 52½°)

For all values of the angle A and B we know that, tan (A + B) = tanA+tanB1−tanAtanB, sin A = 2 sin A2 cos A2 andcos A = cos2 A2 – sin2 A2Now tan 142½°= tan (90 + 52½°)= - cot 52½°

Thank you