Trigonometry Quiz 7

1

sin (A + B) cos (A – B) + sin (A – B) cos (A + B) =

2

If sin A = cos B, then A + B =

3

The value of cos 36° cos 54° – sin 36° sin 54° =

4

The value of $\frac{1}{1+cos\theta} + \frac{1}{1-cos\theta}$ =

5

The value of $tan^2 \theta + tan^4 \theta$ is

6

The value of cos $45^\circ$ . cos $30^\circ$ . cos $90^\circ$ . cos $60^\circ$ =

7

If x = a cosec $\theta$ and y = a cot $\theta$ , then which of the following is true ?

8

If sin A= $\frac{7}{25}$ ,then cot A =

9

cos 12° – sin 78° = …………

10

If x = cosec θ + cot θ,.y = cosec θ – cot θ, then which of the following is true ?

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