Question

How do you prove `(cosx-1)(tanx-1)=0`?

Answer 1

Please check the Question.

Explanation:

Here,
`(cosx-1)(tanx-1)=0`
If we take , `x=30^circ ,`then
`LHS=(cos30^circ-1)(tan30^circ-1)`
`=(sqrt3/2-1)(1/sqrt3-1)`
`~~(0.87-1)(0.58-1)`
`~~(-0.13)(-0.42)`
`~~0.055!=0`
`LHS!=RHS`