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5. Is the equation cos − sin = 1 an identity? If so, verify it. If not, explain why.

5. Is the equation cos − sin = 1 an identity? If so, verify it. If not, explain why.
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5. Is the equation cos − sin = 1 an identity? If so, verify it. If not, explain why.

5. Is the equation cos − sin = 1 an identity? If so, verify it. If not, explain why-example-1
User Ulf Kristiansen
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Answer:

No, cos(x) - sin(x) = 1 is not an identity:

cos(π/4) - sin(π/4) = 0, not 1

User Sameer Shah
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