Prove the following useful trigonometric identities: (a) cos(a + 3) = cos(a) cos(3) - sin(a) sin(3) (b) sin(a + 3) = sin(a) cos(3) + cos(a) sin(3) tan(a)+tan(3) (c) tan(a + 3) 1-tan(a) tan(3)

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A: Simple interest , S.I = P×R×T. Amount = P + S.I

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Q: me

A: We will find the trigonometric values.

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Q: 1) The point (-3,-4) lies on the terminal arm for angle 0. Determine the primary trigonometr ratios…

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