Question

TanA/2= 4/3 find TanA, CosA and Cos3A​

Answer 1

Step-by-step explanation:

TanA/2=4/3

TanA=4 x 2/3

TanA= 8/3

TanA= P/b=8/3

By phythagores

X²= 8²+3²

X²= 64+9

X²= 73

X=✓73

SinA= P/X= 8/√73 or √73 x 8/73

CosA =B/X = 3/√73 or √73 x 3 /√73