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Our expert and friendly tutors can help you learn Trigonometry with ease!
- Review of angles
- Review of triangles
- Trigonometrical functions
- Trigonometrical identities
- Complementary angles
- Signs of trigonometric functions in different quadrants
- Compound, multiple and sub-multiple angles
- Trigonometric equations
- Law of signs and cosines
Our proven 4-step learning approach enables students to understand mathematical concepts and apply these concepts to successfully solve practical problems. We equip you with tips for tricky questions, and teach shortcuts to improve testing speed and mental calculations.
Examples:
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............. (1) |
 , by using (1)
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| 2. |
| Evaluate |
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We know that
Therefore,
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| 3. |
A person standing on the bank of a river, observes that the angle suspended
by a tree on the opposite bank is 60°. When he retreats 2000 feet from the bank, he finds the angle to be at 30°. Find the height of the tree and the width of the river.
Let the height of the tree CD be 'h' feet. Let the width
of the river 'BC' be 'x' Feet.
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| 4. |
The stem of a tree 480 feet high, breaks during a hurricane, in such a way that it's top touches the ground and makes an angle 60° with the ground. At what height from the ground did the stem break?
Let BC represent the tree before it broke.
BC = 480 Feet
Let D be the point on the stem where it breaks. Then after the breakage, AD represents DC in the unbroken state.
 AD makes an angle of 60° with the ground. |
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