Math, asked by jashan7266, 1 year ago

if sinteta-costeta=1 find sinteta+costeta

Answers

Answered by Ayush1999
2

Answer:

Step-by-step explanation: go

Attachments:
Answered by karannahar69212
0

Answer:

Step-by-step explanation:

I will be taking A instead of there

It is given that sinA -cosA=1

that is 1+cosA =sinA______(1)

sinA +cosA=?

We know that

sin^2A+cos^2A=1

that is. 1-cos^2A=sin^2A

(1+cosA)(1-cosA)=sin^2A

Substituting the value of 1+cosA from eqn 1 into this eqn we get

sinA (1-cosA)=sin^2A

that is 1-cosA=sin^2A/sinA

1-cosA=sinA

that is sinA+cosA=1

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