Posted by **alex** on Monday, January 10, 2011 at 12:34am.

Using exact values,find the value of:

(A=30degrees)

sin 2A + tan 3A/2 - cos A + sec(A+15), when A= 30degrees

There were no parentheses and no exponents. please help by showing the work in details. Thank you!

I pluged in the numbers and got this

I don't know if its right or wrong..

2*1/2 + (3*sqrt3/3)/2 -sqrt3/2 + (2sqrt3+15)

- trigonometry -
**drwls**, Monday, January 10, 2011 at 2:43am
Your answer is incorrect. For A = 30 degrees, it is easy to give exact values for each term

sin60 + tan45 -cos30 +sec(45)

= (sqrt3)/2 +1 -(sqrt3)/2 +sqrt2

= 1 + sqrt2

- trigonometry -
**alex**, Monday, January 10, 2011 at 3:39am
Thank you soo much.

- trigonometry -
**alex**, Monday, January 10, 2011 at 3:50am
Can you add 1 to the sqrt of 2 .

Or was that the final answer.

- trigonometry -
**drwls**, Monday, January 10, 2011 at 7:42am
That was the final and exact answer.

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