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Tamal B.

5 years experienced online Maths Tutor

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Linear Algebra

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Question:

if x/5 + 0.4 = 18/20 Find "x "

Tamal B.

Answer:

Given x/5 +0.4 =18/20 or, x/5 + 4/10 =18/20 or, 2x+4/10 = 18/20 or, 4x + 8 = 18 or, 4x = 10 or, x= 5/2 or, x= 2.5

Trigonometry

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Question:

If Tan 30 is 3/4 Find the value of sin 30 + cos 30- cot 30

Tamal B.

Answer:

We Know Tan = PERPENDICULAR / BASE ... Hence - P/B = 3/4 Also from Pythagorus theorem, H^2 = P^2 + B^2 Therefore, H = 5...Hence, Sin30 = 3/5 Cos30 =4/5 and Cot 30 = 4/3. Putting the value, 3/5 + 4/5 - 4/3 = 7/5 - 4/3 = 1 / 15

Geometry

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Question:

IF THE SUM OF ALL THE ANGLES OF A POLYGON IS 6 RIGHT ANGLES . FIND THE NUMBER OF SIDES OF THAT POLYGON AND NAME IT.

Tamal B.

Answer:

WE KNOW , SUM OF ALL THE ANGLES OF A POLYGON IS = (2n-4)X90 DEGREE. Hence, (2n-4)X90 = 6X 90. Therefore, n= 5 Hence number of sides of that polygon is = 5 Hence it is a Pentagon

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