Question

evaluate 5 cos square 30 minus tan square 45 + 4 sec square 30 by sin square 30 + cos square 30​

Answer 1

Answer:

Step-by-step explanation:

_______________________

We know the values of :

1)cos 60° =

2) sec 30° =

3) tan 45° = 1

and

By Trigonometric identity:

______________________

=

=

=

=$\frac{15+64-12}{12}$

=$\frac{15+52}{12}$

=$\frac{67}{12}$

Therefore,

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Answer 2

Just put the values of all the trigonometric ratios of that particular angle and then start calculating. If your calculation is correct, you will get correct answer (or, result).