Question

if sin theta = cos theta find 2 tan^2 theta + sin theta - 1

is the answer 2 + sin theta - 1 correct​

Answer 1

Answer:

yes ur answer is right!!

Step-by-step explanation:

let theta be @

we know that

tan2@ = 2tan@/ 1+tan@

it is given tat sin @=cos @

therefore ;

tan@= sin@/cos@

= 1

substitute tan@ in tan2@

we will get

=2(1)/ 1+ 1

=2/2

=1

therefore substitute tan2@ in the given equation

we will get;

2(1) + sin@ -1

= 1+sin@