Question

Tan 4 A = cot(A-20) find 3A

Answer 1

Answer:

3A=66

Step-by-step explanation:

tan4A=cot(A-20)

cot(90-4A )= cot( A-20)

On comparing the angles

90-4A= A-20

90+20= A+4A

110= 5A

A=22

A/Q.

3A=3×22

3A =66

Hope it helps.

Answer 2

Tan (20-3a) = Cot (5a-20)

tan (20-3a)=tan (90-(5a-20)

Tan (20-3a)=tan (110-5a)

20-3a=110-5a

2a=90

a=45