1 .
ABC is a triangle. It is given that a + c > $90^o$, then b is

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2 .
If the sides AB and AC are equal in ABC and L, M and N are midpoints of the sides BC, CA and AB respectively, then the figure AMLN is a

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3 .
The expression $1 \over tan3A - tanA$ - $1 \over cot3A - cotA$ is

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4 .
If cosec $\theta$ = x + $1 \over 4x$ then the value of cosec $\theta$ + cot $\theta$ is

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5 .
The value of the expression 2($sin^6$ $\theta$ + $cos^6$ $\theta$) - 3 ($sin^4$ $\theta$ + $cos^4$ $\theta$) + 1 is

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6 .
The value of $cos^2$ is

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7 .
The value of sin$ 36^o$.sin $72^o$.sin $108^o$.sin $144^o$ is

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8 .
The value of sin $47^o$+ sin$ 61^o$- sin $11^o$- sin $25^o$ is

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9 .
If cosec $\theta$ + cot $\theta$ = $11 \over 2$, then the value of tan$\theta$ is

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10 .
The sum of twenty consecutive even numbers is 980. Then find the greatest number

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