Tips to solve 'tricky' spherical triangles!!!

You may have never heard of 'tricky' spherical triangles. This video explains these special triangles and provides you with very useful tips to solve them.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).
Mariners will also benefit by watching the following videos:
Napier’s rules for spherical triangles:    • Napier's Rules for right-angled spherical ...  
Napier’s rules (example 2):    • Using Napier's Rule to solve spherical tri...  
Quadrantal triangle:    • Solving Quadrantal triangles in spherical ...  
How to resolve Sine ambiguity in Napier’s rules:    • How to resolve Sine ambiguity using Napier...  
Plane and spherical trigonometry and triangles:    • Plane and Spherical Trigonometry and Trian...  
Trigonometry for mariners:    • Trigonometry for marine deck officers and ...  
Algebra for mariners:    • Algebra for marine deck officers and marin...  
Transposition of math equations:    • How to use Transposition in math equations...  
Great circle sailing:    • Great Circle Sailing Calculation - with in...  
Great circle sailing (example 2):    • How to solve Great Circle Sailing Calculat...  
Great circle sailing (example 3):    • Great Circle sailing calculation with dete...  
Great circle sailing (Example 4):    • Great Circle Sailing Calculations - Example 4  
Determining the final (and Initial) course angle:    • How to determine the Final (and Initial) c...  
Composite great circle sailing:    • Composite Great Circle Sailing - Ocean Nav...  
Composite great circle sailing (Example 2):    • How to solve Composite great circle sailin...  
Calculate departure along a parallel of latitude:    • How to calculate departure (along a parall...  
Calculate d’lat and d’long (Plane sailing):    • How to Calculate D'lat and D'long - Part 1...  
D’lat and m’lat calculation:    • Clear your confusion about d'lat and m'lat...  
Plane sailing (example 1):    • How to calculate course and distance betwe...  
Plane sailing (example 2):    • How to Calculate final position when depar...  
Plane Sailing (example 3):    • Plane Sailing Calculations - Example 3 (Co...  
Plane Sailing (example 4):    • Plane Sailing Calculation - Example 4  
Mercator sailing (Example 1):    • How to solve Mercator sailing calculations...  
Mercator sailing (Example 2):    • Mercator sailing or Rhumb line sailing  
Mercator Sailing (Example 3):    • Mercator Sailing Calculation - Example 3  
Mercator Sailing (Example 4):    • Mercator Sailing Calculations - Example 4  
Calculate mean latitude:    • How to calculate mean latitude or m'lat  
A trick to remembering formulas in sailings:    • A simple trick to remember the formulas in...  
Compare plane sailing to mercator sailing:    • How to compare Plane Sailing to Mercator S...  
Day’s work (wind and leeway):    • Day's Work  - with effect of wind and leew...  
Horizontal sextant angles:    • Using horizontal sextant angles to plot th...  
The use of position lines:    • Coastal Navigation - The use of position l...  
Rising and dipping of lights:    • Rising and dipping of lights at sea - Char...  
Horizontal angles:    • Horizontal angles - Plotting ship's positi...  
Compass error:    • Compass Error Calculation - Coastal Naviga...  
Tidal window calculations:    • Tidal window calculations - Tides (Coastal...  
Secondary port tide calculations:    • Secondary Port Tide Calculation - Tides (C...  
Explaining interpolation of second port tide calculation:    • Explaining the interpolation for Secondary...  
Simplified harmonic method of tide calculation:    • Simplified Harmonic Method Of Tide Calcula...  
Simplified harmonic method (Theory):    • Simple harmonic method - Tide Calculation ...  
Tides (General Theory):    • Tides - General theory (Coastal Navigation)