Multiple choice questions III — task. Mathematics State Board, Class 9.

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1. The value of

$cosec(70° + \theta) - sec(20° - \theta) + tan(65° + \theta) - cot(25° - \theta)$ is .

2. The value of

$tan \ 1° \ tan \ 2° \ tan \ 3° \ …. \ tan \ 89°$ is

3. Given that

$sin \ \alpha = \frac{1}{2}$ and

$cos \ \beta = \frac{1}{2}$ , then the value of

$\alpha + \beta$ is

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3. Multiple choice questions III