Trigonometry ratios and identities by Harvest uma

The value of cos 0* cos 1* cos 2 * cos 3 *------cos 89 =

• 1

• -1

• 0

• 1/2

• 
• 
• 
• 

If x tan 45° sin 30° = cos 30° tan 30°, then x is equal to

• √3

• 1/2

• 1/√2

• 1

What is the maximum value of 1/cosecA ?

• 0

• 1

• 1/2

• 2

If in ΔABC, ∠C = 90°, then sin (A + B) =

• 0

• 1/2

• 1/√2

• 1

Simplify.

• csc²θ
• sec²θ
• cscθ
• 1

Please select the correct solution tan ² x - sec ² x =

• sec ² x - 1

• -1

• 1

• 1 - csc ² x

Ratios of sides of a right triangle with respect to its acute angles are known as

• trigonometric identities

• trigonometry

• trigonometric ratios of the angles

• none of these

If x and y are complementary angles, then

• sin x = sin y

• tan x = tan y

• cos x = cos y

• sec x = cosec y

 $\sec x\ +\frac{1}{\cos\ x}=$  

• 1

• 0

•  $\frac{2}{\cos\ x}$  

•  $\frac{2}{\cos^{2\ }x}$