Find the exact value of each of the following.   cos 420 degree

Q: 7) cos 15°

A: Solution: As per our guidelines, we are supposed to answer only? One question ( if there are…

Q: Find exact values for each of the following.cos  pi/13

A: Given: cosπ13 We know that given angle is in first quadrant

Q: Find the exact value of each expression: (a) sec(arctan(2)) (b) cos(2 sin 13 (a) (b)

A:

Q: Find the exact value of each expression.

A: Given: sincos-1513-cos-145

Q: Use half-angle formulas to find exact values for the following. cos (75°)=______________

A: Firstly, we evaluate value of cos 150 degrees.

Q: Find the exact value of each of the following.   sin 210 degree

A: The given expression is sin210°

Q: 15 and A is in quadrant 2. 17 Find cos(2A), if sin(A)

A:

Q: Find exact values for each of the following.cos 7 pi/13

A: to find the value of given expression

Q: Find the exact value of the expression cos (240° + 45°)

A:

Q: Find the exact value of each expression.

A: Given: y=cos5π4 We know that cosπ+θ=-cosθ                                                        ..1

Q: Find exact values for each of the following. cos  pi/13

A: Exact value of cosπ13

Q: Give the exact value of each of the following.   cos  pi/ 6

A: To find the exact value of the given trigonometric expression.

Q: Find the exact value of each of the following.   sin 390 degree

A: The given angle is sin(390°)

Q: Find exact values for each of the following a. cos 240° b. sec 300° c. cot 480°

A:

Q: Find the exact value of each expression. cos 7π/12

A: Consider cos 7π12= cos 3π+4π12 =cos 3π12+4π12= cos π4+π3

Q: Find the cos 43.5°

A: We can solve this as follows:

Q: Find cos(2A), if cos(A) = - 45/53, and A is in quadrant 2.

A: Given : cos A = -4553and A is in quadrant 2    To Find: cos2A

Q: Give the exact value of each of the following.   cos  pi/ 4

A:

Q: Find the exact value of each of the following.   cos - (30  degree)

A: Here, the objective is to find  the exact value: cos-30°

Q: Find the exact value of each expression, if it is defined. (If an answer does not exist, enter DNE.)…

A:

Q: find the exact value of each expression.

A: cos-1sin5π4

Q: Find the exact value of the given expression without using a calculator. 23n cos 4

A:

Q: Find the exact value of each of the following.   cos 135 degree

A: Given,          cos135°

Q: Give the exact value of each of the following.   sin  pi/ 3

A: We have to find exact value of the expression: sin π3 Converting angle into degree by using relation…

Q: Find the exact value of the expression cos(135° + 30°)

A: Find the exact value of the expression cos(135° + 30°)

Q: If P (0) is in quadrant IV and cos(0) = , then the exact value of cos( 13 2 V13 V13 V13 V13

A: cosθ=513, θ in quadrant IV

Q: Simplify each of the following.   cos 2 165 degree - sin2 165 degree

A: We know the formula: cos2A = cos2A - sin2A   cos 2 165 degree - sin2 165 degree = ?

Q: Find an exact value for each of the following: 31A sin 12

A: We have to use trigonometric identities to solve the given problem. Sinπ\3 = √3/2 Sin π\4 = 1/√2 Cos…

Q: Find exact values for each of the following. cos 7 pi/13

A: cos7π13

Q: Find the exact value of each expression: (a) sec(arctan(2)) (b) cos(2sin^−1(5/13))

A: These problems can be solved by using trigonometric identities and formulas. The solution is…

Q: Find the exact value of the following expression without using a calculator. cos 27

A:

Q: Find the exact value of each of the following.   sin 330 degree

A:

Q: Find the Value of each COS 28T

A:

Q: Find the exact value of each expression. sin arccos 8 (a) co(arctan |(b) 6

A: (a) We need to find the exact value of the expression

Q: Verify that each equation is an identity. Sin 2A cos 2A = sin 2A - 4sin^3 A cos A

A:

Q: Find the exact value of each expression. (a) cos(120° + 45°) (b) cos 120° + cos 45°

A: Given that: (a)cos(120°+45°) (b)cos120°+cos45°

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: Find exact values for each of the following:   cos 15 degree

A: we have to find,  cos15∘

Q: Find the exact value of the expression. COS 117 6.

A: we have to find

Q: Find a cofunction with the same value as the given expression cos Pi/17

A:

Q: 80 and A is in quadrant 4. 89 Find cos(2A), if sin(A)

A:

Q: Find exact values for each of the following, if possible.   cosec 45  0

A: we have to find the exact value of cosec 45°.

Q: Find cos(2A), if cos(A) 48 and A is in quadrant 3. 73

A: See the attachment

Q: calculator

A:

Q: Give the exact value of each of the following.   sin  pi/ 2

A: Given: y=sinπ2 For finding value of given expression, we draw graph of sine function as below

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

Q: Find the exact value of each of the following.   cos 225 degree

A: We have to find the exact value of cos225°

Q: Find the exact value of each of the following.   cos - (240  degree)

A: we have to find the exact value of   cos - (240  degree)

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.