If ABC is right-angled at C, then the value of cos (A + B) is

                               

1.  0

2.  1

3.  12

4.  32

Subtopic:  Trigonometry |
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If a vector is inclined at angles, α, β, and γ with x, y, and z-axis respectively, then the value of sin2 α + sin2 β+ sin2 γ is equal to

1. 0

2. 1

3. 2

4. 12

Subtopic:  Trigonometry |
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What is the maximum value of 5sinθ – 12cosθ?

1.  12

2.  17

3.  7

4.  13

Subtopic:  Trigonometry |
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Which of the following is not possible?
1. sin θ = \(3\over5\)
2. sec θ = 100
3. cosec θ = 0.14
4. None of the above

Subtopic:  Trigonometry |
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