Friday
December 13, 2013

Posted by CJ on Thursday, January 13, 2011 at 5:30pm.

Given sine of alpha=2/3 and cosine of alpha is less than zero, find the exact value of the other five trigonometric functions.

sketch a right-angled triangle with hypotenuse 3 and opposite side as 2
by Pythagoras the adjacent side to angle alpha is √5

You should know the definition of the 6 trig ratios in terms of opposite, adjacent and hypotenuse

e.g. tan (alpha)= 2/√5

Related Questions

Trigonometry - Given that sin alpha = 15/17 and -360 <alpha<360 find all ...
trigonometry - given that sin alpha/2 = 2/3, and that alpha/2 is in quadrant II...
Trigonometry - Find the counterexample to shows that the equation sec (alpha) - ...
Trigonometry - Prove that tan^2(alpha)-1+cos^2(alpha)sin^2(alpha) Please Explain
trig - FInd the exact value pf the 6 trig function of alpha Given: point (-2,-6...
Trigonometry - Find the exactly value of sin2(alpha) if cos(alpha) = 4/5 (alpha ...
Trigonometry - Write cos(-83degrees) as a function of a positive angle Prove ...
maths (trigonometry) - sin(alpha-bita)=1/2 and cos(alpha+bita)=1/2, where alpha ...
Math - If alpha and beta are the zeros of the polynomial ax^2 + bx + c then ...
physics - The acceleration of a bus is given by $$a_{x}(t)= \alpha t$$, where...

Search
Members