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Use identities to find the value of each expression. 1) If sin , find cos ( 2) If tan ( ) , find cot (
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Verify each identity. sin x + csc x. 1) = sin2 x + 1 csc x. cos x - sin2 x. 2) cot x - sin x = sin x. 1 - csc x. 3) = sin x - 1 csc x. 1 cos x. 4) = 1 + tan x cos x + sin x. 5) cot2. 1. x(1 + cot2 x) = tan2 xsin2 x.
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Answers to Worksheet Review Trig. Identities (basic) (ID: 1) tan2 x - sec2 x. 1) cos x. Use tan2 x + 1 = sec2 x. 1. - cos x. 1. Use sec x = cos x. -sec x sec x.
Basic Word Problems. 1) Jimmy is 25' from the base of a tree. The angle of elevation to the top of the tree is 51°. Determine the height of the tree. 3) A ladder is leaning against a wall. It has an angle of elevation of 60° and reaches 8.5' up the wall. Determine the length of the ladder. 5) Jimmy is flying a blimp.
