Question

if cos theta - sin theta = 1, then the value of cos theta + sin theta is equal to:​

Answer 1

Answer:

+-1

Step-by-step explanation:

(cos-sin)^2=1

so we can infer from this that 2sincos=0

so cos+sin+2cossine=(sin+cos)^2=1

so sin+cos=  +-1

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Answer 2

Answer:

answer will be -1

Step-by-step explanation:

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