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without using Trigonometric Table prove that tan48 tan23 tan42 tan67 tan 45 equal to 1​

By Allison

without using Trigonometric Table prove that tan48 tan23 tan42 tan67 tan 45 equal to 1​

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Allison

An army contingent of 616 members is to march behind an army band of 32 members in a parade. The two groups are to march in the sa

The volume of cube is 216 centimeter 3

. Find its side.​

1 thought on “without using Trigonometric Table prove that tan48 tan23 tan42 tan67 tan 45 equal to 1​”

  1. Step-by-step explanation:

    tan 48 tan 23 tan 42 tan 67 tan 45=1

    L.H.S = tan(45+3) tan(45- 22) tan(45-3) tan(45+22) tan 45 = (tan45+tan3)(tan45-tan22) (tan 45 -tan3)(tan 45+tan22)(1)

    _________. _________ ________ __________

    1 -tan45tan3 1+tan45tan22 1+tan45tan3. 1-tan45tan22

    =(1+tan3) (1-tan22) (1-tan3) (1+tan22)

    ______ ______ _____ _______

    1-tan3 1+tan22. 1+tan3. 1-tan22

    All values are cancelled out

    =》 1. = R.H.S

    Hence proved that L.H.S=R.H.S

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