Question

If tantheta=3√3, then costheta= what

Answer 1

tan theta =3✓3

cos theta = ?

we have,

1+ tan²theta = sec²theta

1+ (3✓3)²= sec² theta

1+ 27 = sec² theta

thus, sec theta will be = ✓28 or

2✓7

thus, costheta is, 1/sectheta

therefore,

cos theta = 1/(2✓7)