What will be the nature of roots of quadratic equation 2x
2−4 x+3=0 ?
22) If x=3 is one root of the quadratic equation x
2−2 Kx−6=0, then find
value of k.
23) If one zero of the quadratic polynomial x
2−5 x−6 is 6 , then find the
other zero .
24) The H.C.F of two numbers a and b is 5 and their L.C.M is 200. Find the
product ab .
25) express sin 67° +cos 75° in terms of trigonometric ratios of angles
between 0° &45° .
D. Short Answers Types Questions (3x10=30}
26} Evaluate
<1>
sin 18°
cos72°
. <2> cos 48° - sin42° .
27) If tan A = cot B, then prove that A+B= 90° .
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What will be the nature of roots of quadratic equation 2x
2−4 x+3=0 ?
22) If x=3 is one root of the quadratic equation x
2−2 Kx−6=0, then find
value of k.
23) If one zero of the quadratic polynomial x
2−5 x−6 is 6 , then find the
other zero .
24) The H.C.F of two numbers a and b is 5 and their L.C.M is 200. Find the
product ab .
25) express sin 67° +cos 75° in terms of trigonometric ratios of angles
between 0° &45° .
D. Short Answers Types Questions (3x10=30}
26} Evaluate
<1>
sin 18°
cos72°
. <2> cos 48° - sin42° .
27) If tan A = cot B, then prove that A+B= 90° .
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