Question

how did this step came?

plz explain nicely for 50 points else I'm reported !

Answer 1

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Tan∅= -1 -------(1)


We know that -

Tan(90+∅)= -cot∅ ------(2)



Than if we put 45° in place of ∅ in Equation (2)


Tan(90+45) = -cot45


and we know that Cot45 = 1


Then-

Tan135° = -1

Now put the value of (-1) into the equation (1)


Tan∅ = Tan135°


Tan is cancelled by Tan

______________
∅= 135° Ans.
______________
______________


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Answer 2

Heyy mate ❤✌✌❤

Here's your Answer...

⤵️⤵️⤵️⤵️⤵️⤵️⤵️

Tan∅= -1 -------(1)


We know that -

Tan(90+∅)= -cot∅ ------(2)


Than if we put 45° in place of ∅ in Equation (2)

Tan(90+45) = -cot45

and we know that Cot45 = 1

Then-

Tan135° = -1

Now put the value of (-1) into the equation (1)

Tan∅ = Tan135°

Tan is cancelled by Tan

∅= 135° Ans.
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