1. The altitude drawn to the base of an isosceles triangle is 8 cm and its perimeter is 64 cm. The area (in cm2) of the triangle is

120

240

180

360

2. The product cos1° cos2° cos3° cos4°... cos 100° is equal to

0

-1

1/4

1

3. The greatest value of sin4  + cos4  is

1

2

3

1/3

4. If 3 sin θ  + 5 cos θ  = 5, then 5sin θ – 3cos θ  is equal to

 

+2

+ 3

+5

1

5. If sin θ + sin2 θ  = 1, then the value of cos2 θ +cos4 θ is

1

2

4

0

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