Question

If cos theta = 2/3, then evaluate 2 sec^2 theta+ 2 tan^2 theta -7

Answer 1

Answer:

0

Step-by-step explanation:

since cos(x) =2/3

therefore, sin(x)= √1-cos^2(x)

sin(x)=√5/3

sec^2(x)=1/cos^2(x)=9/4

tan^2(x)=sin(x)/cos(x)=5/4

2sec^2 (x)+ 2 tan^2 (x) -7

7-7

0