Question

which of the following is false a)tanA= 1-a²/1+a² b) cotA= 1-a²/1+a² c) secA= 1-a²/1+a² d) sinA=1-a²/1+a²

Answer 1

Answer:

domain of sec function is >1 and < -1 so option c is false

Step-by-step explanation:

sec A = 1-a2/1+a2 <1

so sec A does not exist