a) Explain why sin ß = cos(90° b) Use your calculator to show that sin 36.5° and cos 53.5° are equivalent. В). %3D

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A:

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A: The answer is mentioned below

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A:

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A: cos-1(cos(π/8)) We know, cos-1(cos(x)) = x

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A: Given18sin(29.5°)cos(29.5°)we know that double angle identitiessin(2θ)=2sinθ.cosθ

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A: Given that Where A in quadrant 1 and B in quadrant III

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A: Since you have asked multiple questions in single request  so we  will be answering only first…

Q: with

A:

Q: ind cose, given that sin0 = -5/13 and 0 s in quadrant III. %3D elect one: a. -12/13 b. -5/12 C. 12/5…

A: Answer is- Option a is correct Explanation is given below...

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A:

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A: To find the exact value of the expression,cos11π6. Solution: The given expression is , cos11π6…

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A: Given the equation . The objective is to solve for .

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A:

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A: Use trigonometric identity

Q: 3. 4

A: To find the trigonometric ratios from the given right triangle