Q3 of 268 Page 4

Find the numerical value of the following :

2sin230° – 3cos2 45° + tan2 60ׄ°

We know that,




Tan (60o) = √3


Now putting the value;







=2


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Find the numerical value of the following :

sin2 60° – cos2 60°

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Find the numerical value of the following :

4sin2 30° + 3 tan 30° – 8 sin 45° cos 45°

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Find the numerical value of the following :

sin 90° + cos 0° + sin 30° + cos 60°

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Find the numerical value of the following :

sin 90° – cos 0° + tan 0° + tan 45°