6th grade doubt
Why sir didn't take +-2
And in the next step he took +- sign
I am just too confused in this sqrt stuff
Please explain me in the easiest way possible.
Thanks
@iTeachChem
8 Replies
@Apu
Note for OP
+solved @user to close the thread when your doubt is solved. Mention the user who helped you solve the doubt. This will be added to their stats.Because for a real Argument , tan²x is always a positive quantity...
If You were in 6th grade
They would have told ..
Tan⁴x=4
Tan²x=±2
But tan²x can't be -ve hence
Tan²x must be 2
Hence tan x = ±√2
Well you want to go in the complex World
Yes
Tan²x=-2
And tan x=±i √2
Also counts
Idk why I wrote 6th standard doubt but thanks
Thanks brother +solved @Sam @iTeachChem
+solved @Sam
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