In a right angled triangle if hypotense is 20 cm and ratio of other two sides is 4 : 3, the length of the sides are

• 4 cm and 3 cm

• _{8 cm and 6 cm} 

• 12 cm and 9 cm

• 16 cm and 12 cm

62.

If sinA + sin²A = 1, what is the value of cos² + cos⁴A = ?

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• 1

• 2

• 3

The least number which when divides 37044, gives the result a perfect cube is

• 2

• 4

• 14

• 21

A man spends in 8 months as much as he earns in 6 months. He saves â‚¹ 6,000/- in a year. His average monthly income is:

• ₹ 2,400/-

• ₹ 2,000/-

• ₹ 2,150/-

• ₹ 1,800/-

If   and   then the value of  will be

• 0

• 1

• 2

• -1

If  be an identity, then the value of b is

• 0

• -1

• 2

• 3

In Δ ABC, ∠BAC = 90° and AD is perpendicular to BC. If AD = 6cm and BD = 4 cm, then the length of BC is

• 10 cm

• 12 cm

• 13 cm

• 15 cm

D and E are the points on the sides AB and AC respectively of a Delta; ABC and AD = 8 cm, DB = 12 cm, AE = 6 cm and EC = 9 cm, then BC is equal to

• DE = 2/5 DE

• DE = 5/2 DE

• DE = 3/2 DE

• DE = 3/5 DE

ABC is a right angled triangle with  Then the value of cos²A + cos²B + cos²C is:

• 2

• 1

• 0

• 3

In what time (in years) will â‚¹ 8,000/- amount to â‚¹ 9,261/- at 5% per annum, compounded annually?

• 3

• 

• 4

•