Find the angle `theta`whose cosine is equal to its tangent.
A. `cos theta=2cos18^(@)`
B. `cos theta=2sin18^(@)`
C. `sintheta=2 sin18^(@)`
D. `sintheta=2cos18^(@)`
A. `cos theta=2cos18^(@)`
B. `cos theta=2sin18^(@)`
C. `sintheta=2 sin18^(@)`
D. `sintheta=2cos18^(@)`
Correct Answer – C