Maths-
General
Easy

Question

tan space A equals a tan space B comma sin space A equals b sin space B not stretchy rightwards arrow fraction numerator a to the power of negative 1 end exponent 1 over denominator a squared equals 1 end fraction equals

  1. sin squared space A    
  2. sin cubed space A    
  3. cos squared space A
  4.  cos cubed space A      

The correct answer is: cos squared space A


    G i v e n blank x to the power of 2 end exponent plus y to the power of 2 end exponent equals 16
    S subscript 1 end subscript equals S subscript 11 end subscript blank Þ x x subscript 1 end subscript plus y y subscript 1 end subscript minus open parentheses x 1 to the power of 2 end exponent plus y 1 to the power of 2 end exponent close parentheses=0
    a n d blank 2 square root of r to the power of 2 end exponent minus d to the power of 2 end exponent end root equals 4 blank Þ r to the power of 2 end exponent minus d to the power of 2 end exponent equals 4
    W h e r e blank r equals 4 blank semicolon d equals blank fraction numerator open vertical bar x 1 to the power of 2 end exponent plus y 1 to the power of 2 end exponent close vertical bar over denominator square root of x 1 to the power of 2 end exponent plus y 1 to the power of 2 end exponent end root end fraction equals square root of x 1 to the power of 2 end exponent plus y 1 to the power of 2 end exponent end root
    16 open parentheses x 1 to the power of 2 end exponent plus y 1 to the power of 2 end exponent close parentheses equals 4
    L o c u s blank o f blank scriptbase p end scriptbase presuperscript ´ end presuperscript to the power of ´ end exponent blank i s blank x to the power of 2 end exponent plus y to the power of 2 end exponent equals 12
    r equals square root of 12 equals 2 square root of 3

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