Homework Help: math

Posted by chyrl on Saturday, December 9, 2006 at 4:15pm.

Can anyone help w/ these.

1) Solve the equation in the internal [0deg, 360deg].

a) sin 2x = -sin x

b) sin 2T = -1/2 (where T is angle)

c) 4 sin^2T = 3

2) Evaluate the expression.

sin(arctan 2)

3) Rewrite the following w/o using trigonometric or inverse tirgonometric functions.

cos(arcsin u)

In a use the double angle formula: Sin2X= 2sinXcosX

When you divide thru by sinX, be certain to remember to test to see if X=0 is a solution also.

In b, solve for 2T (then divide it by two).

in C, take the square root of each side, solve for sinT, and then T.

in 2, remember solve for arcTan2, then what is the sine of that?

In 3, remember that if sine = u, then cos of the complementary angle is u.

No one has answered this question yet.

Answer this Question

Related Questions

math - Eliminate the parameter (What does that mean?) and write a rectangular ...
TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
Trig - sin^4t-cos^4t/sin^2t cos^2t= sec^2t-csc^2t i have =(sin^2t+cos^2t)(sin^2t...
tigonometry - expres the following as sums and differences of sines or cosines ...
calculus/Trig - Suppose you wish to express sin(3t) in terms of sint and cost. ...
Calculus - Consider the function f(x)=sin(1/x) Find a sequence of x-values that ...
trig - For each expression in column I, choose the expression from column II to ...
algebra - Can someone please help me do this problem? That would be great! ...
trig - The expression 4 sin x cos x is equivalent to which of the following? (...
Calculus - Consider the function f(x)=sin(1/x) Find a sequence of x-values that ...

For Further Reading

First Name:
School Subject:
Answer: