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**1. Explain why the functions y= cos x and y = sin(x+90) are the same function. Explanation must be detailed include graphs if you wish.**

**2. Outline why the identities are referred to as Pythagorean identities:**

sin²θ + cos²θ = 1

1 + tan²θ = sec²θ

1 + cot²θ = csc ²θ

sin²θ + cos²θ = 1

1 + tan²θ = sec²θ

1 + cot²θ = csc ²θ

HELP PLEASEEEE!!!! thanks in advance