Trigonometry
India
Class XI
Trigonometric ratios of obtuse angles
Interactive practice questions
Write the following trigonometric ratio using an acute angle:
$\sin147^\circ$sin147°
Easy
< 1min
Write the following trigonometric ratio using an acute angle:
$\cos165^\circ$cos165°
Easy
< 1min
Write the following trigonometric ratio using an acute angle:
$\tan157^\circ$tan157°
Easy
< 1min
Evaluate $\sin146^\circ$sin146° correct to two decimal places and make note of the sign of your answer.
Easy
< 1min
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