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/sci/ - Science & Math

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2387909 No.2387909 [Reply] [Original]

For -180<∅<180 solve tan²3∅=1 (use the general equations)?

Hi /sci/

Thakn for helping me on my previous work however im really stuck on this question and asking for help

From my own knowledge i did:

Tan 3∅ = +/- 1

3∅ = +/- 45

∅ = 15

And then by using the general equation

15+180n and -15 +180 n

the range is -180 < ∅ < 180

However It seems i have got it wrong when this is the only solution I can think of. Any help please?

The answers are +/- 45 15 75 105 135 165

>> No.2387942

you are aplying your formula at the wrong point.
3Ø=+/-45 +180n

>> No.2387945

>>2387942

I got that.

THen i divided by 3 to get 15; is this incorrect?

>> No.2387956

>>2387942
He said that the domain is ]-180,180[

>> No.2387975

>>2387956

ty for ur help but im still getting this wrong.

I cant seem to get 75 by plugging in a number :/

>> No.2388038

bump for question help ive been onf or an hour =[

>> No.2388242

Remember it is tan^2 not tan.

>> No.2388283

why's it tan ^2