а. Find sin 0 if tan 0 = 3 and cos 0 < 0. b. The supplement of an angle is four times its complement. Find the angle.

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A: Find the value of tan (90°- θ).

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A: We can find the dot product using the given data in the below steps.

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A: Solution is in step 2

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A: NOTE: Refresh your page if you can't see any equations. . the given point is so here we have

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A: