Math Homework Help - Tagged with Trigonometry

What is product `sin 7^o cos 14^o cos 28^o cos 56^o`  ?

Posted by bufves May 16, 2013 at 2:46 PM via web. 1 educator answer. »

1. Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos (4x) = ?  2. Use...

Posted by samanthahuber May 16, 2013 at 12:18 PM via web. 1 educator answer. »

Solve 2tanx+secx=1

Posted by vegeta9000 May 16, 2013 at 5:17 AM via web. 1 educator answer. »

`sinx/sqrt 2 = cos^2x`

Posted by schlule May 16, 2013 at 12:13 AM via web. 2 educator answers. »

Prove: `((1+1/tanx)(tan^2x - sin^2 x))/(tan^2x)=1`   Thank you

Posted by durbanville May 14, 2013 at 12:04 PM via web. 1 educator answer. »

i) What is the domain of the function f(x) = arccos (|x-1|)? ii) Simplify the function sin(arcsin(x))

Posted by yoory08 May 13, 2013 at 4:02 PM via web. 1 educator answer. »

Solve the equation sin^8 x − cos^4 2x + cos^8 x = 0 .

Posted by roshan-rox May 13, 2013 at 7:38 AM via web. 1 educator answer. »

Show this is identity sin 10o cos20o cos 40o=1/8

Posted by canekang May 12, 2013 at 4:15 PM via web. 1 educator answer. »

Write sum sin x+sin2x+···+sinnx as 1 product?

Posted by jamnette May 8, 2013 at 8:41 AM via web. 1 educator answer. »

If 1+sin^2x = 3 sinxcosx, then prove that tanx = 1 or 1/2.

Posted by user9897427 May 8, 2013 at 6:47 AM via web. 1 educator answer. »