Question

1. sinx =4/3
does exist for some value of angle x? Why?
2. What can you say about the values of sin A and cos A as the value of angle A increases
from 0° to 90°?
3. Evaluate sec 70° sin 20° - cos 20° cosec 70°.
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Answer 1

1.ans... no, because the range of sine function is from -1 to 1.

2. Ans.... value of sin A increase while value of cos A decrease from 0 to 90.

3. Ans.... 0