Forwarded from Maths Tricks & formulas (Megha)
90rsββ
Only 20rsβ β
Do practice a lot and check ur calculation speed and accuracy βΊοΈ
Offer limited π
500 Questions for practice
Check your calculation speed
https://t.me/Jaishreeganesh888
Only 20rsβ β
Do practice a lot and check ur calculation speed and accuracy βΊοΈ
Offer limited π
500 Questions for practice
Check your calculation speed
https://t.me/Jaishreeganesh888
β€2
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β€8
β€9π1
β€10
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βStill scared of percentages? π
Let me show you how easy it actually is π
π‘ Quick Percentage Trick
π Example: Find 20% of 250
Step 1: 10% of 250 = 25
Step 2: 20% = 2 Γ 25
β¨ Final Answer = 50
π₯ Another Example
π Find 15% of 200
Step 1: 10% = 20
Step 2: 5% = Half of 10% = 10
β¨ Answer = 30
β‘ Pro Trick (Game Changer)
π Find 25% of any number
π‘ Just divide by 4
π 25% of 800 = 200
π― Why This Matters?
Most people: β Fear percentages
β Use calculators
β Waste time
But you can: β Solve in seconds
β Build confidence
β Think faster than others
π¬ Final Thought
βMath isnβt difficultβ¦
Itβs just taught in a complicated way...
Let me show you how easy it actually is π
π‘ Quick Percentage Trick
π Example: Find 20% of 250
Step 1: 10% of 250 = 25
Step 2: 20% = 2 Γ 25
β¨ Final Answer = 50
π₯ Another Example
π Find 15% of 200
Step 1: 10% = 20
Step 2: 5% = Half of 10% = 10
β¨ Answer = 30
β‘ Pro Trick (Game Changer)
π Find 25% of any number
π‘ Just divide by 4
π 25% of 800 = 200
π― Why This Matters?
Most people: β Fear percentages
β Use calculators
β Waste time
But you can: β Solve in seconds
β Build confidence
β Think faster than others
π¬ Final Thought
βMath isnβt difficultβ¦
Itβs just taught in a complicated way...
β€5π1π₯°1
π₯ Trigonometry Made Easy: Find Values of Any Angle in Seconds!
Most students struggle with angles like 125Β°, 225Β°, 335Β° π
But hereβs a super easy trick π
π‘ STEP 1: Break the angle
Convert angle into:
π (Multiple of 90Β° or 180Β°) Β± Acute Angle
Examples:
125Β° = 90Β° + 35Β°
225Β° = 180Β° + 45Β°
335Β° = 360Β° - 25Β°
π‘ STEP 2: Use reference angle
π Ignore big angle, focus on small angle (35Β°, 45Β°, 25Β°)
π‘ STEP 3: Apply sign using quadrant trick
Quadrant
Sign Rule
0Β°β90Β°
All +
90Β°β180Β°
sin +
180Β°β270Β°
tan +
270Β°β360Β°
cos +
π― Examples:
π sin(125Β°) = sin(90Β° + 35Β°) = cos(35Β°) βοΈ (+ sign)
π cos(225Β°) = cos(180Β° + 45Β°) = -cos(45Β°) = -1/β2 β
π tan(335Β°) = tan(360Β° - 25Β°) = -tan(25Β°) β
π§ Shortcut Formula (Golden Rule)
\sin(90^\circ+\theta)=\cos\theta,\quad \cos(90^\circ+\theta)=-\sin\theta,\quad \tan(180^\circ+\theta)=\tan\theta
π₯ Pro Tip:
π Just remember:
90Β° β swap (sin β cos)
180Β° β sign change
360Β° β same value, sign depends
π Conclusion:
Now you can solve ANY angle in seconds β‘
No need to memorize everything!
Most students struggle with angles like 125Β°, 225Β°, 335Β° π
But hereβs a super easy trick π
π‘ STEP 1: Break the angle
Convert angle into:
π (Multiple of 90Β° or 180Β°) Β± Acute Angle
Examples:
125Β° = 90Β° + 35Β°
225Β° = 180Β° + 45Β°
335Β° = 360Β° - 25Β°
π‘ STEP 2: Use reference angle
π Ignore big angle, focus on small angle (35Β°, 45Β°, 25Β°)
π‘ STEP 3: Apply sign using quadrant trick
Quadrant
Sign Rule
0Β°β90Β°
All +
90Β°β180Β°
sin +
180Β°β270Β°
tan +
270Β°β360Β°
cos +
π― Examples:
π sin(125Β°) = sin(90Β° + 35Β°) = cos(35Β°) βοΈ (+ sign)
π cos(225Β°) = cos(180Β° + 45Β°) = -cos(45Β°) = -1/β2 β
π tan(335Β°) = tan(360Β° - 25Β°) = -tan(25Β°) β
π§ Shortcut Formula (Golden Rule)
\sin(90^\circ+\theta)=\cos\theta,\quad \cos(90^\circ+\theta)=-\sin\theta,\quad \tan(180^\circ+\theta)=\tan\theta
π₯ Pro Tip:
π Just remember:
90Β° β swap (sin β cos)
180Β° β sign change
360Β° β same value, sign depends
π Conclusion:
Now you can solve ANY angle in seconds β‘
No need to memorize everything!
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π₯ Easy Tricks for 5%, 15%, 25%β¦ up to 95%
π§ Base Idea:
π 10% = divide by 10
π 5% = half of 10%
ΰ€ ΰ€¬ ΰ€¬ΰ€Έ combination use ΰ€ΰ€°ΰ€¨ΰ€Ύ ΰ€Ήΰ₯ π
β 5%
π 10% ΰ€ΰ€Ύ half
β‘οΈ Example: 5% of 200 = 10 β half = 5
β 15%
π 10% + 5%
β‘οΈ Example: 15% of 200 = 20 + 10 = 30
β 25%
π Divide by 4
β‘οΈ Example: 25% of 200 = 50
β 35%
π 30% + 5%
β‘οΈ Example: 35% of 200 = 60 + 10 = 70
β 45%
π 50% β 5%
β‘οΈ Example: 45% of 200 = 100 β 10 = 90
β 55%
π 50% + 5%
β‘οΈ Example: 55% of 200 = 100 + 10 = 110
β 65%
π 50% + 10% + 5%
β‘οΈ Example: 65% of 200 = 100 + 20 + 10 = 130
β 75%
π 50% + 25%
β‘οΈ Example: 75% of 200 = 100 + 50 = 150
β 85%
π 100% β 15%
β‘οΈ Example: 85% of 200 = 200 β 30 = 170
β 95%
π 100% β 5%
β‘οΈ Example: 95% of 200 = 200 β 10 = 190
π‘ Golden Shortcut Rule:
βοΈ 5% = half of 10%
βοΈ 25% = divide by 4
βοΈ 50% = half
βοΈ 100% = full value
π ΰ€¬ΰ€Ύΰ€ΰ₯ ΰ€Έΰ€¬ = combination game π―
π§ Base Idea:
π 10% = divide by 10
π 5% = half of 10%
ΰ€ ΰ€¬ ΰ€¬ΰ€Έ combination use ΰ€ΰ€°ΰ€¨ΰ€Ύ ΰ€Ήΰ₯ π
β 5%
π 10% ΰ€ΰ€Ύ half
β‘οΈ Example: 5% of 200 = 10 β half = 5
β 15%
π 10% + 5%
β‘οΈ Example: 15% of 200 = 20 + 10 = 30
β 25%
π Divide by 4
β‘οΈ Example: 25% of 200 = 50
β 35%
π 30% + 5%
β‘οΈ Example: 35% of 200 = 60 + 10 = 70
β 45%
π 50% β 5%
β‘οΈ Example: 45% of 200 = 100 β 10 = 90
β 55%
π 50% + 5%
β‘οΈ Example: 55% of 200 = 100 + 10 = 110
β 65%
π 50% + 10% + 5%
β‘οΈ Example: 65% of 200 = 100 + 20 + 10 = 130
β 75%
π 50% + 25%
β‘οΈ Example: 75% of 200 = 100 + 50 = 150
β 85%
π 100% β 15%
β‘οΈ Example: 85% of 200 = 200 β 30 = 170
β 95%
π 100% β 5%
β‘οΈ Example: 95% of 200 = 200 β 10 = 190
π‘ Golden Shortcut Rule:
βοΈ 5% = half of 10%
βοΈ 25% = divide by 4
βοΈ 50% = half
βοΈ 100% = full value
π ΰ€¬ΰ€Ύΰ€ΰ₯ ΰ€Έΰ€¬ = combination game π―
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