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  1. socratic.org
    https://socratic.org/questions/the-value-of-sin20-sin40-sin60-sin80-is

    The value of sin20.sin40.sin60.sin80 is? - Socratic

  2. socratic.org
    https://socratic.org/questions/16sin20-sin40-sin60-sin80-3-prove

    16sin20.sin40.sin60.sin80=3 Prove.? - Socratic

  3. socratic.org
    https://socratic.org/questions/how-do-you-simplify-sin80-sin10-sin80-sin10

    How do you simplify # (sin80°-sin10°) / (sin80°+ sin10°)#? - Socratic

  4. socratic.org
    https://socratic.org/questions/answer-the-value-96sin65-sin35-sin80-sin…

    Answer The Value? 96Sin65° Sin35° Sin80°/Sin20° +2Sin80° Cos30°

  5. brainly.in
    https://brainly.in/question/13091100

    Prove that Sin80 -cos110 = root3sin50 - Brainly.in

  6. socratic.org
    https://socratic.org/questions/if-cos-2-20-sin-2-20-p-then-sin80

    If #cos^(2)20^@-sin^(2)20^@=p# then #sin80^@=#? - Socratic

  7. brainly.in
    https://brainly.in/question/1370752

    Prove that Sin10°+Sin20°+Sin40°+Sin50°=Sin70°+Sin80° - Brainly

  8. socratic.org
    https://socratic.org/questions/cos-80-cos-40-sin-40

    (cos(80°)-cos(40°))/sin(40°) - Socratic

  9. brainly.in
    https://brainly.in/question/13359536

    Sin 20° + sin 40° - sin 80° - Brainly

  10. brainly.in
    https://brainly.in/question/17946996

    If sin80+sin50= 2sinA.cosB then a and b is - Brainly.in