Question

Find the exact value. Sin30degrees x tan60degrees-Cos30degrees

Answer 1

I'm not positive but I believe sin30 is 1/2, tan60 is sqrt3, and cos30 is sqrt3/2, so when you do that you get sqrt3/2-sqrt3/2=0

Answer 2

thank you so much ! and what about for 2Cos45xSin45 ?

Answer 3

yes the answer is 0.

Answer 4

how would I find the exact value for 2Cos45xSin45 I am having difficulties

Answer 5

2(sqrt2/2)xsqrt2/2=2(2/4)=1 I think

Answer 6

but isn't cos 45 = 1/sqrt 2 ?

Answer 7

nevermind ! thank you so much !

Answer 8

wait i am confused

Answer 9

Isn't 2(2/4) = 4/8 ? how is it 1 ?

Answer 10

no... 2 (2/4) = 2 x 2 /4 = 4 / 4 = 1

otherwise you havent times by 2 because 2/4 = 4/8 :)