4. Use apploppriate identities to find the exact Value each of Coš 105° expression.

Q: Find the exact value of the expression. 15 cos tan 8 12 Cos 13

A: Given expression costan-1158-cos-11213. The objective is to find the exact value of the expression.

Q: Give the exact value of CoS 2

A: We have to find the values of angle at which the value of cosine is -32.

Q: Use Identities to find the exact value. 5) cos (285°)

A:

Q: Find the exact value of cos 195° + cos 105°

A:

Q: Find the exact value of the expression cos(arctan 3/4).

A:

Q: Establish each identity. as attached.

A: Assume x=2u in the equation cos2(2u)-sin2(2u)=cos(4u) that will be cos2(x)-sin2(x)=cos(2x) and than…

Q: Given that A = tan^−1 (3/4), find cos (2A).  Give exact answer

A: Given:

Q: 2) Use the fundamental identities to simplify the expression: (1 – cos? x)(csc x).

A:

Q: Use the equivalent forms of the first Pythagorean identity. Find cos e if sin 8 = 3 and e terminates…

A:

Q: Find the exact value of each expression.

A: Formula for sine of a sum of angles is sinA+B=sin A cos B+cos A sin B. Formula for cosine of a sum…

Q: Establish each identity. as attached.

A: We have to establish the given identity: sin 3θsin θ-cos 3θcos θ=2 We know the identity, sin 3θ=3…

Q: Find the exact value of each expression.

A: We have to use trigonometric ratios to solve the expression . The cosine function is an even…

Q: Use an appropriate identity to find the exact value of the expression. 13) cos 13) 14) tan (165°)…

A:

Q: Give the exact value of each of the following:     cos 135 0

A:

Q: Find the exact value of the expression cos (120° - 45°)

A:

Q: What is the exact value of cos 157.5° using half-angle identities?

A: We know: cosx2=±1+cos x2   (half angle identity for cosine) Substituting x=315° we get:…

Q: Find the exact value of each expression given in attachment.

A:

Q: Find the exact value of each expression

A: We expression cos[2tan-1(-43)] Let  y = cos2tan-1(-43) To find the value of this expression Let…

Q: Find the exact value of each expression.

A: Find the exact value of each expression. let tan-143=x⇒tan x=43here, perpendicular=4 , base=3using…

Q: Use a sum or difference formula to find the exact value of the following. sin cos 15 10 + cos 10 sin…

A: given,

Q: 3. Use De Moivre's Theorem to find the identity of the following: a. cos 80 b. sin 90 c. cos 100

A:

Q: 3n 8 If tan 0= find the exact value of each of the following. 2 cos (20)

A:

Q: Use De Moivre's Theorem to find the identity of the following: a. cos 80 b. sin 90 c. cos 100

A:

Q: (9) Use the half-angle identity to find cos 3π and < x < 2 JOTE: Enter the exact, fully simplified…

A: Given problem:- tan(x) =4/3  Find cos(x/2) and π&lt;x&lt;3π/2

Q: use the fundamental identities to simplify the expression. 1/cot2theta +sec theta cos theta

A:

Q: Use the equivalent forms of the first Pythagorean identityFind sin theta If cos theta is -1/4

A:

Q: 9. Use a half-angle identity to evaluate exactly sin(112.5°)

A:

Q: Show that cos (90 degree - A) = sin A.

A: The given identity is cos90∘ -A=sinA.

Q: 2. What is the exact value of cos (22.5°) using the half-angle identities? O √2+√2 √2-√2 O √2-√2 O…

A:

Q: Suppose that csc a = and 0<a< 4 Find the exact values of cos and tan-

A:

Q: If cos 210°=-√3/2,find the value of tan105°

A: We know that : cos2θ=1-tan2θ1+tan2θ or, tan2θ=1-cos2θ1+cos2θ. Here given that θ=105° .

Q: Use the equivalent forms of the first Pythagorean identity If sin θ = −3/5 and θ terminates in QIII,…

A:

Q: What is the exact value of the expression cos(arctan(7/8))

A:

Q: Use Identities to find the exact value. 19) cos 165°

A: cos(A+B)=cos(A) cos(B)-sin(A)sin(B)

Q: If @= tan(1) and 180 <0<360", which of the following is equivalent to cos 6? O V2 O 1//2 O-1/V2 01…

A: The detailed solution is given below Thank you

Q: Use half angle or power reduction formulas to fill in the blanks in the identity below: 1…

A:

Q: If 180 is less than or equal to theta and greater than or equal to 270 degrees and cos (theta)=-2/9…

A: Here given as

Q: For all values of o for which the expresSIon is defined cos (20) tan ² answer should contain coto,…

A: We have to solve the problem

Q: 18) Use the identity to find the exact value sin 135 -30

A:

Q: Use the sum-to-product identity to find an expression that is equivalent to cos(15ß) – cos(9ß).

A: you can clearly understand if you follow the below solution

Q: Use the appropriate identity to find the exact value of the expression. 11T Cos 12

A:

Q: 2. If we verify the identity 1-cos² 0 = cos? Otan? 0 numerically by substituting the value 0 = the…

A: Given identity: 1-cos2θ=cos2θtan2θ

Q: Use half-angle formulas to find exact values for each of the following.     cos 15    0

A: Let's start with the :                  Cosine half angle formula:…

Q: Use the equivalent forms of the first Pythagorean identity.If  cos θ = 1/2  and θ terminates in QI,…

A: Given,

Q: Find an exact expression for cos 5. 16

A:

Q: practice question, I attached a photo

A: The first Pythagorean identity is sin2 x + cos2 x = 1.

Q: If 5 tan 0 12 with 90° < 0 < 180° , find: cos O

A:

Q: Verify the identity by transforming the lefthand side into the right-hand side.

A:

Q: Find the exact value of cos 4

A: Here we have to find the exact value of;  cos5π4=?

Q: If sin(θ)= √77/ 9 and θ is in the 2nd quadrant, find the exact value of cos(θ)

A: Given: sinθ=779 We know that the trigonometric identity; sin2θ+cos2θ=1