Is (cos(θ))/(sec(θ)-tan(θ))=1sin(θ) ?

The answer to whether (cos(θ))/(sec(θ)-tan(θ))=1sin(θ) is False

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

prove (cos(θ))/(sec(θ)-tan(θ))=1sin(θ)

prove

\frac{cos ( θ )}{sec ( θ ) - tan ( θ )} = 1 sin (θ)

False

Solution steps

\frac{cos ( θ )}{sec ( θ ) - tan ( θ )} = 1 \cdot sin (θ)

Show that the two sides are not equal

For

\frac{cos ( θ )}{sec ( θ ) - tan ( θ )} = 1 sin (θ)

plug in

θ = 0

\frac{cos ( 0 )}{sec ( 0 ) - tan ( 0 )} = 1

\frac{cos ( 0 )}{sec ( 0 ) - tan ( 0 )}

Use the following trivial identity:

cos (0) = 1

cos (0)

cos (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= 1

Use the following trivial identity:

sec (0) = 1

sec (0)

sec (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sec (x) 1 \frac{2 3}{3} 22 Undefined - 2 - 2 - \frac{2 3}{3} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sec (x) - 1 - \frac{2 3}{3} - 2 - 2 Undefined 22 \frac{2 3}{3}

= 1

Use the following trivial identity:

tan (0) = 0

tan (0)

tan (x)

periodicity table with

πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

= 0

= \frac{1}{1 - 0}

Simplify

= 1

1 \cdot sin (0) = 0

1 \cdot sin (0)

Use the following trivial identity:

sin (0) = 0

sin (0)

sin (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= 0

= 1 \cdot 0

Simplify

= 0

The two sides are not equal

\Rightarrow False

cot (2 x) + csc (2 x) = cot (x)

tan (x) + 2 cos (x) \cdot csc (x) = sec (x) \cdot csc (x) + cot (x)

- \frac{cos ( b )}{1 - sin ( b )} + \frac{cos ( b )}{1 + sin ( b )} = - 2 tan (b)

sin (x - \frac{π}{2}) + sin (x + \frac{π}{2}) = 0

sin (- x) + csc (x) = cot (x) \cdot cos (x)

Is (cos(θ))/(sec(θ)-tan(θ))=1sin(θ) ?
The answer to whether (cos(θ))/(sec(θ)-tan(θ))=1sin(θ) is False