Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (25°) – sin° (25°) = cos(A°), then A = degrees. (b) If cos (4x) – sin (4x) = cos(B), then %3D

Q: sin ;cos T = 6.

A: To find sin-π6=     cosπ=

Q: cos 2.

A: Using the trigonometric formula,  cos2θ=2cos2θ-1⇒cos2θ+1=2cos2θ⇒cos2θ+12=cos2θ⇒cos2θ=cos2θ+12 Taking…

Q: Find x if cos 53°= sin x. %3D (1) 90° (2) 127° (3) 53° (4) 370

A: To find x, if cos53°=sin x

Q: Find the exact value of each expression. (a) sin(40°) cos(20°) + cos(40°) sin(20°) (b) sin(75°) (c)…

A: Using formula, sinAcosB+cosAsinB=sinA+B in part (a) ,we have (a)-:…

Q: Using a double-angle or half-angle formula to simplify the given expressions (a) If cos (35°)- sin…

A: We have to find the angle

Q: If sinA=4/5 and cosB= -5/13, where A belongs to QI and B belongs to QIII, then find sin(A+B). How do…

A: Given that Where A in quadrant 1 and B in quadrant III

Q: Cos h2

A: The given series is ∑n=1∞1n2cos1n. Let an=1n2cos1n. Note that, the bound of cosine function is…

Q: In the figure below, a pole has two wires attached to it, one on each side, forming t right…

A: Given, Two right triangle with same height p. where a and b are length of the wire A and B…

Q: Determine whether the function f(r) = 4 tan(r) cos(r) is even, odd, or neither. i) Even ii) Odd iii)…

A: Given function, f(x)=4tan(x)cos(x)

Q: Cos 12

A:

Q: Use the Pythagorean Identity to write the double angle formula for cosine in two alternate forms by…

A:

Q: -11m. ii. cos-1(cos()) CO 6.

A: Given problem:- cos-1(cos(11π6))=?

Q: Simplify. (sina - cos a)² =? 01 - sin(2a) 01 - cos(2a) 01 01 + cos(2a)

A: we have given equation

Q: a. cos (sin-¹)

A: a. using property of inverse of If then from the question let then