Question

Which of the following is not correct?
(A) cos @ = 1
(B) sin @ =- 1/5
(C) sec @ =1/ 2
(D) tan @ = 20​

Answer 1

Answer:

Cos @ = 1 - Sin @

........

Answer 2

Answer:option c sectheta= 1/2 is the incorrect option.

Step-by-step explanation: sectheta=1/costheta=1/2

Therefore, costheta=2

But we know that -1<=Costheta<=1

Hence the option is incorrect