4. Find the absolute maximum and minimum values of the function f(x) = cos²x-3 sinx on the interval 0≤x≤.

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A: The triangle has lengths,AC=b=14BC=a=20∠C=123°

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A: This question can be solved using law of cosine.

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A: Given;  z1=21 cis(135) z2=3 cis(75).

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A: Since you have posted multiple questions i can do first question as per our company guidelines…

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A: On solving this we will get

Q: 5- prove that

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Q: Express the complex number z = 9√3+9i in standard polar form.

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Q: 12) Find BC C 138 B A) 24.1 in C) 21 in 22 in A B) 28 in D) 29 in

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A: On solving this we will get

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Q: 16.6 30° 17.5 42.5°

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Q: 4 Find mLA C 12 mi B A) 23.2° C) 22.1° 27.6 mi 20.3 mi B) 19.9⁰ D) 24.5⁰

A: Explained below

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Q: Cosine function that has amplitude of 2, midline of 5, and a period of 3 pi/2

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Q: Learning competency :Find the six trigonometric ratios of special angles. (M9GE-IVb-c-1) S F 45° 60°…

A: Concept: Trigonometric ratios: sinθ=PH ; cosecθ=HPcosθ=BH ; secθ=HBtanθ=PB ; cotθ=BP Here P is…