Trigonometry Answers

Which pair represents (4, –4) in polar plane?

A. (6.56, 47.77)
B. (6.56, 43.77)
C. (5.66, 44.76)
D. (5.56, 47.77)

The distance of the point R from the pole is 65. Its direction forms a 60 degrees angle with x-axis. Which is the y-coordinate of Q?

A. 54.28
B. 54.29
C. 56.29
D. 56.82

Point M(12, 18) is given in a rectangular plane. Which is the distance of this point from the pole?

A. 12.63
B. 18.36
C. 20.46
D. 21.63

please prove this:
(1+sec2A *cot2Y)/(1+sec2B *cot2 Y )=(1+tan2A*cos2Y)/(1+tan2B*cos2Y)

in above 2 is power in all case

prove the following indentities

a) sin(x+y)sin(x-y)=sin^2x-sin^2y
a) sin2x+sin4x+sin6x=4cosxcos2xsin3x

At what point the graph of f(x) = 2cos x – 1 intersects the x-axis?

A. x=π/6
B. x=π/4
C. x=π/3
D. x=π/8

Let tan cot y =4 Which is tan x?

A. 0.25
B. 2.5
C. 0.5
D. 5

Let (sin x) + (cos x) = 1.24 and csc x + sec x = 6.58. Which is (sin x)(cos x) ?

A. .13456
B. .16
C. .1884
D. .14

sinA/1-COSA+tanA/1+cosA=2secAcosecA+cotA prove that

sinA/1-cos
A+tanA/1+cosA=2secAcosecA+cotA prove the identity