The value of (sec245° - cot245°) - (sin230° + sin260&

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91.

If straight alpha space plus space straight beta space equals space 90 degree and straight alpha space colon thin space straight beta space equals space 2 space colon space 1 comma then the ratio of cos space straight alpha space to space cos space straight beta is:

  • 1 space colon space square root of 3

  • 1 : 3

  • 1 colon square root of 2

  • 1 colon square root of 2

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92.

If tan2x + cot2x is

  • 3

  • 2

  • 0

  • 1

98 Views

93.

If cos space 21 degree space equals space straight x over straight y comma space then cosec space 21 degree space minus space cos space 69 degree  is equal to

  • fraction numerator straight x squared over denominator straight y square root of straight y squared minus straight x squared end root end fraction

  • fraction numerator straight y squared over denominator straight x square root of straight y squared minus straight x squared end root end fraction

  • fraction numerator straight y squared over denominator straight x square root of straight x squared minus straight y squared end root end fraction

  • fraction numerator straight x squared over denominator straight y square root of straight x squared minus straight y squared end root end fraction

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94.

If tan (5x - 10°) = cot (5y + 20°), then the value of (x + y) is

  • 15°

  • 16°

  • 22 1 half degree

  • 24°

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95.

θ is a positive acute angle and sin θ - cos θ = 0, then the value of sec θ + cosec θ is

  • 2

  • square root of 2

  • 2 square root of 2

  • 3 square root of 2

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96.

The value of fraction numerator 2 space tan space 53 degree over denominator cot space 37 degree end fraction space minus space fraction numerator cot space 80 degree over denominator tan begin display style space end style begin display style 10 end style begin display style degree end style end fraction is:

  • 3

  • 2

  • 1

  • 0

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97.

The value of cot space 17 degree open parentheses cot space 73 degree space cos squared 22 degree space plus space fraction numerator 1 over denominator cot space 17 degree space sec squared 68 degree end fraction close parentheses is

  • 0

  • 1

  • 2

  • square root of 3

72 Views

98.

If θ > 0, be acute angle, the value of θ in degrees satisfying
fraction numerator cos squared straight theta space minus space 3 space cosθ space plus space 2 over denominator sin squared straight theta end fraction space equals space 1 is:

  • 90°

  • 30°

  • 45°

  • 60°

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99.

The value of (sec245° - cot245°) - (sin230° + sin260°) is

  • 1

  • 2 square root of 3

  • 0

  • fraction numerator 1 over denominator square root of 2 end fraction


C.

0

left parenthesis sec squared 45 degree space minus space cot squared 45 degree right parenthesis space minus space left parenthesis sin squared 30 degree space plus space sin squared 60 degree right parenthesis
equals space open square brackets open parentheses square root of 2 close parentheses squared space minus space left parenthesis 1 right parenthesis squared close square brackets space minus space open square brackets open parentheses 1 half close parentheses squared space plus space open parentheses fraction numerator square root of 3 over denominator 2 end fraction close parentheses squared close square brackets
space equals space 2 space minus space 1 space minus space 1 fourth space minus space 3 over 4
equals space fraction numerator 8 minus 4 minus 1 minus 3 over denominator 4 end fraction
equals space fraction numerator 8 minus 8 over denominator 4 end fraction space space equals space 0

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100.

If θ is acute angle and sin (θ + 18°) = 1/2, then the value of θ in circular measure is:

  • straight pi over 12 space radians

  • straight pi over 15 space radians

  • fraction numerator 2 straight pi over denominator 5 end fraction space radians

  • fraction numerator 3 straight pi over denominator 13 end fraction space radians

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